Transistors, the building blocks of modern electronics, are typically made of silicon. Because it’s a semiconductor, this material can control the flow of electricity in a circuit. But silicon has fundamental physical limits that restrict how compact and energy-efficient a transistor can be.

MIT researchers have now replaced silicon with a magnetic semiconductor, creating a magnetic transistor that could enable smaller, faster, and more energy-efficient circuits. The material’s magnetism strongly influences its electronic behavior, leading to more efficient control of the flow of electricity. 

The team used a novel magnetic material and an optimization process that reduces the material’s defects, which boosts the transistor’s performance.

The material’s unique magnetic properties also allow for transistors with built-in memory, which would simplify circuit design and unlock new applications for high-performance electronics.

“People have known about magnets for thousands of years, but there are very limited ways to incorporate magnetism into electronics. We have shown a new way to efficiently utilize magnetism that opens up a lot of possibilities for future applications and research,” says Chung-Tao Chou, an MIT graduate student in the departments of Electrical Engineering and Computer Science (EECS) and Physics, and co-lead author of a paper on this advance.

Chou is joined on the paper by co-lead author Eugene Park, a graduate student in the Department of Materials Science and Engineering (DMSE); Julian Klein, a DMSE research scientist; Josep Ingla-Aynes, a postdoc in the MIT Plasma Science and Fusion Center; Jagadeesh S. Moodera, a senior research scientist in the Department of Physics; and senior authors Frances Ross, TDK Professor in DMSE; and Luqiao Liu, an associate professor in EECS, and a member of the Research Laboratory of Electronics; as well as others at the University of Chemistry and Technology in Prague. The paper appears today in Physical Review Letters.

Overcoming the limits

In an electronic device, silicon semiconductor transistors act like tiny light switches that turn a circuit on and off, or amplify weak signals in a communication system. They do this using a small input voltage.

But a fundamental physical limit of silicon semiconductors prevents a transistor from operating below a certain voltage, which hinders its energy efficiency.

To make more efficient electronics, researchers have spent decades working toward magnetic transistors that utilize electron spin to control the flow of electricity. Electron spin is a fundamental property that enables electrons to behave like tiny magnets.

So far, scientists have mostly been limited to using certain magnetic materials. These lack the favorable electronic properties of semiconductors, constraining device performance.

“In this work, we combine magnetism and semiconductor physics to realize useful spintronic devices,” Liu says.

The researchers replace the silicon in the surface layer of a transistor with chromium sulfur bromide, a two-dimensional material that acts as a magnetic semiconductor.

Due to the material’s structure, researchers can switch between two magnetic states very cleanly. This makes it ideal for use in a transistor that smoothly switches between “on” and “off.”

“One of the biggest challenges we faced was finding the right material. We tried many other materials that didn’t work,” Chou says.

They discovered that changing these magnetic states modifies the material’s electronic properties, enabling low-energy operation. And unlike many other 2D materials, chromium sulfur bromide remains stable in air.

To make a transistor, the researchers pattern electrodes onto a silicon substrate, then carefully align and transfer the 2D material on top. They use tape to pick up a tiny piece of material, only a few tens of nanometers thick, and place it onto the substrate.

“A lot of researchers will use solvents or glue to do the transfer, but transistors require a very clean surface. We eliminate all those risks by simplifying this step,” Chou says.

Leveraging magnetism

This lack of contamination enables their device to outperform existing magnetic transistors. Most others can only create a weak magnetic effect, changing the flow of current by a few percent or less. Their new transistor can switch or amplify the electric current by a factor of 10.

They use an external magnetic field to change the magnetic state of the material, switching the transistor using significantly less energy than would usually be required.

The material also allows them to control the magnetic states with electric current. This is important because engineers cannot apply magnetic fields to individual transistors in an electronic device. They need to control each one electrically.

The material’s magnetic properties could also enable transistors with built-in memory, simplifying the design of logic or memory circuits.

A typical memory device has a magnetic cell to store information and a transistor to read it out. Their method can combine both into one magnetic transistor.

“Now, not only are transistors turning on and off, they are also remembering information. And because we can switch the transistor with greater magnitude, the signal is much stronger so we can read out the information faster, and in a much more reliable way,” Liu says.

Building on this demonstration, the researchers plan to further study the use of electrical current to control the device. They are also working to make their method scalable so they can fabricate arrays of transistors.

This research was supported, in part, by the Semiconductor Research Corporation, the U.S. Defense Advanced Research Projects Agency (DARPA), the U.S. National Science Foundation (NSF), the U.S. Department of Energy, the U.S. Army Research Office, and the Czech Ministry of Education, Youth, and Sports. The work was partially carried out at the MIT.nano facilities.

EFF welcomes our new Executive Director Nicole Ozer today! 

Nicole is a legal expert on privacy and surveillance, artificial intelligence, and digital speech who previously served as the inaugural executive director of the Center for Constitutional Democracy at UC Law San Francisco. From 2004-2025, she was founding director of the Technology and Civil Liberties Program at the American Civil Liberties Union of Northern California. 

Nicole has long been a partner of EFF’s in the fight to defend civil liberties in the digital world. Many of us already know her, and she’s basically as close to EFF “family” as someone can be without actually having worked here.   

Over her more than two decades leading public interest technology work, Nicole has:  

• spearheaded passage of the California Electronic Communications Privacy Act – working with EFF to enact the nation’s strongest electronic surveillance law, requiring a warrant for government access to electronic information; 
• modernized California law to protect reading records in the digital age by helping, along with EFF, to craft the Reader Privacy Act, requiring a “super warrant” for government access; 
• created a groundbreaking model law for local democratic oversight of surveillance systems which inspired 25 laws across the country that help safeguard the rights and safety of more than 17 million people; 
• litigated civil liberties cases, including work with EFF on the NSA cases, and drafted influential amicus briefs on technology issues at all levels of state and federal court, including the U.S. Supreme Court and California Supreme Court; and 
• developed multi-year campaigns to strengthen the anti-surveillance policies related to social media surveillance and face recognition of major technology companies and foster stronger privacy and free expression protection for billions of people worldwide. 

And that's just the TL;DR! You can read more about her bona fides here. 

EFF’s work to ensure technology supports freedom, justice, and innovation is more urgent than ever. And with Nicole’s decades of leadership in public interest technology work, EFF is poised to be stronger than ever to meet this moment and build for the fights ahead. 

Nicole succeeds Cindy Cohn, who has been with EFF for more than 25 years and served as executive director since 2015. Cindy is leaving EFF later this month – not to retire, but to find a role that puts her back in the courtroom doing what she does best: suing the government! She’ll still be part of the EFF community. 

We are living digital lives, using technology to connect, communicate, and mobilize for change. And we need you in these critical fights to defend and advance rights in the digital world – so join EFF today, and sign up for our EFFector newsletter to make sure you’re updated on the latest EFF news including upcoming events to help you get to know Nicole. 

Welcome Nicole! 

A political earthquake over energy prices in New England is transforming Democratic positions on natural gas.

The request to Congress' watchdog agency comes after POLITICO's E&E News found that Trump has approved only 23 percent of blue-state aid requests.

EPA’s refrigerator rule rollback rests on a one-sided ledger.

Labor unions are using their political power — and a jobs message — to influence state efforts to regulate data centers.

Illinois will impose its first restrictions on rate hikes and could order policyholder refunds. "They're losing," an advocate says of insurers.

The settlement is the latest agreement the state has reached with oil companies over their alleged liability for Louisiana's disappearing coast.

Regulators approved changes meant to ease costs for refineries, while critics warn the overhaul could undermine emissions goals and drain climate funding.

Gov. Kathy Hochul secured changes to the state’s 50-year-old environmental review law to speed up housing construction.

Player-turned-chemicals boss Mathieu Flamini believes going green is the answer to Europe’s competitiveness problems.

Fordlandia was built in 1927 in Pará by Ford Motor as a rubber-tapping metropolis intended to secure a steady supply of natural rubber for tires.

These subscription-based services ship straight to customers everything from everyday and workwear. Then, the items are returned for someone else to use.

Someone named “Squid” seems to be a “West Country legend.”

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Blog moderation policy.

After public outrage, California lawmakers are moving closer to exempting open-source operating systems from the sweeping age-bracketing regime mandated by last year’s Digital Age Assurance Act (AB 1043). Nonetheless, the current bill still jeopardizes internet users’ speech, privacy, and security.

While the open source exemption, if passed, would improve the law, the remaining amendments proposed by AB 1856 would require all web browsers and websites to request and collect users’ ages. This is an expansion of last year's AB 1043's age-bracketing system that compounds its constitutional harms to users’ speech, privacy, and security. As AB 1856 moves on to the Senate, EFF will continue fighting for amendments that reduce those harms.

AB 1856 Extends AB 1043’s Age-Gating Regime

Last year, California passed AB 1043, which requires all operating systems and app stores to create age-bracketing systems that segment users based on their ages. As we’ve written, that regime is a recipe for censorship: it creates unnecessary and unconstitutional barriers to accessing lawful online speech, threatens our right to anonymity, and pressures online services to collect troves of valuable and sensitive user data. On top of that, A.B. 1043’s wide-sweeping compliance burdens impose disproportionate harms on the open-source ecosystem that underpins much of the modern web. 

Given these flaws, lawmakers introduced AB 1856 this year as a supposed “clean-up” bill for AB 1043. But instead of sticking to fixing AB 1043’s unique and serious harms (like its impact on open-source operating systems), AB 1856 also expanded the regime even further—extending its age-bracketing requirements beyond operating systems and app stores to browsers and websites. 

EFF opposed AB 1856 on two grounds, which we explained in our opposition letter to the Assembly: 

1. The harms that age-gating regimes pose to users’ speech, privacy, and anonymity; and
2. The disproportionate harms that this particular regime imposes on open-source developers. 

Open Source Concerns Somewhat Alleviated By Amendment

On May 28th, AB 1856 passed the Assembly in a nearly unanimous vote (68-1). 

Before that vote, however, AB 1856 was amended to relieve the compliance burden on open-source operating systems. This is a meaningful improvement and a welcome relief for open-source developers, who have been loud and clear about how much of an existential threat A.B. 1043’s age-gating mandate would pose.

The new exception reads:

“Operating system provider” does not mean a person or entity that distributes an operating system or application under license terms that permit a recipient to copy, redistribute, and modify the software.”

EFF understands this amendment to exempt open-source operating systems from the requirement to collect and transmit users’ age-bracket data. That is a definite win for open-source developers. The bill is narrower now than it was before, and lawmakers clearly responded to concerns raised by EFF and the broader open-source community. 

Some important questions still remain—for example, it is unclear how the law would apply when an open-source operating system is incorporated into a commercial product or service. And, given the structure of where the exemption is placed under the “operating system provider” definition, lawmakers could stand to clarify that the exemption applies to open-source operating systems and applications.

Nonetheless, that ambiguity aside, this amendment does substantially reduce the threat that AB 1043 could have on many open-source developers. 

AB 1856 Still Expands the Problematic Age-Bracketing Regime

Don’t get us wrong—if this bill passes, we will be very happy that AB 1043 does not pose nearly the amount of harm to our friends behind open-source operating systems. But even after these amendments, EFF remains opposed to AB 1856 because it ultimately expands California’s sweeping age-bracketing framework far beyond the original scope of AB 1043. 

In AB 1856 and its amendments, the Assembly failed to address the core problem with AB 1043’s age-bracketing regime: mandated age-gating systems threaten users’ speech, privacy, anonymity, and security. 

Even after these amendments, EFF remains opposed to AB 1856 because it ultimately expands California’s sweeping age-bracketing framework far beyond the original scope of AB 1043. 

Even though AB 1043 does not explicitly require companies to perform age verification, it nonetheless imposes a liability structure that strongly pressures companies to verify users’ ages anyway. In practice, that could lead to more ID checks, more biometric scanning, more invasive data collection and risk of breach, and more barriers to adults’ and young people’s lawful speech.

In fact, instead of narrowing AB 1043’s wide net, AB 1856 expanded it to add browser providers and website operators to the list of entities that must comply with its age-bracketing requirements. This dramatically broadens the scope of AB 1043 and pulls more services, developers, and users into an anonymity- and privacy-destroying data collection framework that has not yet been implemented or evaluated. The result would make it nearly impossible for regular internet users to avoid AB 1043’s age gates.

The Fight Moves to the Senate

On those grounds, EFF will continue to oppose AB 1856. Though it has passed the Assembly, the fight is not over. As the bill moves through the Senate, we’ll continue to push for amendments that actually “clean up” and narrow the scope of AB 1043, and offer more protection to users from the harms of age-gating systems.

Cheered on by the greater MIT community, members of the Class of 2026 were honored this week for the hard work that earned them their newly minted MIT degrees.

The 2026 Commencement celebrations spanned three days filled with degree ceremonies, receptions, and reunions, at locations spread across campus. The weather ranged widely, but spirits remained high even as Wednesday’s sunny, selfie-perfect weather gave way to some rain later in the week.

Advanced Micro Devices chair and CEO Lisa Su ’90, SM ’91, PhD ’94 gave the Commencement address at the OneMIT ceremony for all graduates, held Thursday. Undergraduates crossed the stage during their own ceremony on Friday, and throughout the three-day celebration, MIT’s five schools and the MIT Schwarzman College of Computing each held ceremonies to recognize their graduate students. Friday also kicked off a weekend of Tech Reunions.

As Institute Professor and School of Engineering Dean Paula Hammond told graduate students earning degrees from her school and the MIT Schwarzman College of Computing, “What makes MIT special isn’t just what happens underneath this dome. What makes MIT special is you.”

The following photo essay provides a snapshot of MIT Commencement activities throughout the week. (Additional recaps/photo collections are available for the School of Architecture and Planning, School of Engineering/MIT Schwarzman College of Computing, and School of Humanities, Arts, and Social Sciences).

What distinguishes the MIT School of Architecture and Planning’s Class of 2026? According to faculty and staff across the school, it’s their hearts.

“They’re big-hearted in the way they deal with each other, with their work, and with the world,” said Hashim Sarkis, dean of SA+P, in his opening remarks at the school’s 2026 Advanced Degree Ceremony. As a nod to the class’s generosity, Sarkis announced the creation of the Class of 2026 Scholarship fund to help support incoming students.

“Education is a right, not a privilege, and this fellowship brings us closer to our goal of giving this right to every student and becoming tuition-free as a school,” said Sarkis.

The news was met with joyful and sustained applause.

The SA+P Class of 2026 represents graduates from each of the school’s departments: Architecture; Urban Studies and Planning; Media Arts and Sciences (MIT Media Lab); and the Center for Real Estate. The 206 graduates — including six with dual degrees — represent nearly every corner of the globe. Fifty-seven percent are from the United States, 10 percent are from China, and 5 percent are from India.

This year’s speaker was Alejandro Aravena, a celebrated Chilean architect whose credits include curating the 2016 Venice Architecture Biennale “Reporting From the Front,” and being awarded the Pritzker Prize (2016), the most prestigious award in architecture — for which he currently serves as jury chair. Aravena leads the architectural firm ELEMENTAL, based in Santiago, Chile, with work that spans a variety of public and private projects developing novel approaches to community engagement shaping how architects and policymakers think about the built environment.

Sarkis said Aravena speaks eloquently to the breadth of fields represented in SA+P, and to the school’s values, “[from] the power of architecture and design to enable society to his innovative models of social housing to creative approaches to community engagement — be it in emergency planning after earthquakes, or in institutional buildings — and to putting architecture front and center in the discussions around the new constitution of Chile.” 

Addressing the students and their guests, Aravena shared a series of vignettes that illustrated a world at a “tipping point.” Will it land on the side of civilization, or barbarism?, he asked. One story was of his firm’s work on a project in Chile where his team encountered the “law of the jungle.” During a slum-upgrading project, two social workers from the Ministry of Housing were stalked on their way home by hired killers. With knives at their throats, they were warned never to return if they intended to interfere with the territorial power of organized crime. The message was clear: Come back, and your families will pay the price, he said. A more recent project — building a hospital for victims of sexual violence linked to the armed conflict in Colombia — had the architects questioning the level of violence that people inflict on each other.

If the “law of the jungle” was going to be the new normal, Aravena said, he needed to understand what that meant. Measuring the sizes of a prefrontal cortex — the brain’s command center that controls emotions, complex decision-making, and executive function — within the animal kingdom, humans have the largest capacity for emotions and behaviors.

“The history of humanity and the evolution of the human condition is connected,” he said. “It’s moving in the direction of the prefrontal cortex. Yet, somehow, we’re turning backwards.”

Aravena suggested the students use their newly acquired skills to work on projects that matter to others, and not to just themselves.  

“Leveling the playing field, having more people behaving and coexisting in a more even playground, is very bad news for predators,” said Aravena. “Try to use this knowledge and wisdom you have and the training you have received in common interests, and not in just the self. Let’s try to bring back decency. Let’s try to bring back kindness. Let’s try to bring back honoring the truth. And let’s join forces to make the coin fall on the most human possible side.

“Class of 2026, together, let’s make the prefrontal cortex great again,” Aravena concluded. 

“I’m originally from Moorestown, New Jersey, a suburb of Philadelphia. While my degree is in chemical engineering, I consider myself a materials scientist, and I’m passionate about using innovative materials to propel next-generation technologies. When I started my bachelor’s degree at Cornell University, I was introduced to polymers and nanotechnology and even got to partake in some meaningful industry experiences in the medical device field. While the work I did felt impactful, I felt like I lacked a sense of driving innovation, and so I decided to pursue a PhD at MIT.

My doctorate in Michael Strano’s lab has focused on a novel material at the intersection of polymers and nanomaterials. This material, called 2DPA-1, is like a combination of graphene, the strongest and most conductive material, with Kevlar, which is what makes up bulletproof vests. My thesis has been pivotal in establishing the characterization tools for this material so that future researchers can optimize its properties for different applications. Going forward, I’ve signed an offer letter with a startup that is making portable nuclear reactors for areas without stable grid electricity. I’ll work on various problems surrounding the materials that make up the reactors. 

I always knew that I wanted my dog, Vinny, to have a doctoral gown for graduation. He’s been with me throughout my entire PhD and has been a pivotal member of my research group, helping everyone by being cute and reducing their stress. I couldn’t find any specific vendors online, and I love learning crafts to make custom items (crochet, knitting, and embroidery to make my own clothes; bookbinding to make my own journals and my physical thesis; and pottery to make my own mugs and dishes), so I thought: Why not try to sew a gown for him? I watched and read a few tutorials, used the sewing machines at Metropolis, and hand-sewed the finishing touches. I’m a bit of a perfectionist and could keep working on it, but I know that Vinny looks cute regardless of what he wears. I am so delighted and grateful that Vinny was part of my ceremony. He’s been such a pivotal part of my PhD journey, and my life as a whole. I can’t imagine a finer end to my time at MIT!” 

—Michelle Quien PhD ’26, graduate of the Department of Chemical Engineering

Younger Americans have soured on the second Donald Trump presidency, but they are not protesting it.

Despite an unpopular Iran war and an even more unpopular Trump administration, college campus protests nationwide have gone silent. And at many schools, student activism is virtually nonexistent.

This silence comes in the wake of a relentless Trump administration war on campus speech that has involved lawsuits, arrests, deportations and expulsions.

Reports cite a range of complicated factors for the restraint, from apathy to technology-induced incapacity. But as ...

New Bedford, Massachusetts, is ground zero for America’s wind industry.