Physicists find a novel way to Switch Antiferromagnetism On and Off

antiferromagnetism device
In turning antiferromagnetism on and off, MIT physicists may have found a route towards faster, denser, and more secure memory devices.
Credits:Credit: stock image

The findings could lead to faster, more secure memory storage, in the form of antiferromagnetic bits. When you save an image to your smartphone, those data are written onto tiny transistors that are electrically switched on or off in a pattern of “bits” to represent and encode that image. Most transistors today are made from silicon, an element that scientists have managed to switch at ever-smaller scales, enabling billions of bits, and therefore large libraries of images and other files, to be packed onto a single memory chip.

But growing demand for data, and the means to store them, is driving scientists to search beyond...

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A New Window to see Hidden Side of Magnetized Universe

The bent jet structures emitted from MRC 0600-399 as observed by the MeerKAT radio telescope (left) are well reproduced by the simulation conducted on ATERUI II (right). The nearby galaxy B visible in the left part of the MeerKAT image is not affecting the jet and has been excluded in the simulation. (Credit: Chibueze, Sakemi, Ohmura et al. (MeerKAT image); Takumi Ohmura, Mami Machida, Hirotaka Nakayama, 4D2U Project, NAOJ (ATERUI II image))

New observations and simulations show that jets of high-energy particles emitted from the central massive black hole in the brightest galaxy in galaxy clusters can be used to map the structure of invisible inter-cluster magnetic fields...

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Scientists Model Saturn’s Interior, explain planet’s Unique Magnetic field

Left: The magnetic field of Saturn seen at the surface. Image: Ankit Barik/Johns Hopkins University. Right: Saturn’s interior with stably stratified Helium Insoluble Layer. Image: Yi Zheng (HEMI/MICA Extreme Arts Program)

New Johns Hopkins University simulations offer an intriguing look into Saturn’s interior, suggesting that a thick layer of helium rain influences the planet’s magnetic field.

The models, published this week in AGU Advances, also indicate that Saturn’s interior may feature higher temperatures at the equatorial region, with lower temperatures at the high latitudes at the top of the helium rain layer.

It is notoriously difficult to study the interior structures of large gaseous planets, and the findings advance the effort to map Saturn’s hidden regions.

“By st...

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New Synapse-like Phototransistor

 Ground- and excited-state charge transfer in bilayer NC/SWCNT heterojunctions.

Researchers at the U.S. Department of Energy’s National Renewable Energy Laboratory (NREL) developed a breakthrough in energy-efficient phototransistors. Such devices could eventually help computers process visual information more like the human brain and be used as sensors in things like self-driving vehicles.

The structures rely on a new type of semiconductor — metal-halide perovskites — which have proven to be highly efficient at converting sunlight into electrical energy and shown tremendous promise in a range of other technologies.

“In general, these perovskite semiconductors are a really unique functional system with potential benefits for a number of different technologies,” said Jeffrey Blackb...

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