Authors: George Rajna
In a recently published paper in Science, researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS), were able to both excite and detect spin waves in a quantum Hall ferromagnet, demonstrating a new platform to investigate some of the possibilities of this promising material.  Taichi Goto at the Toyohashi University of Technology and Caroline Ross of the Massachusetts Institute of Technology and others collaborated to create a single-crystalline yttrium iron garnet (YIG) film as a magnetic insulator on multiple substrates, and transmit the spin waves.  To address this technology gap, a team of engineers from the National University of Singapore (NUS) has developed an innovative microchip, named BATLESS, that can continue to operate even when the battery runs out of energy.  Stanford researchers have developed a water-based battery that could provide a cheap way to store wind or solar energy generated when the sun is shining and wind is blowing so it can be fed back into the electric grid and be redistributed when demand is high.  Researchers at AMOLF and the University of Texas have circumvented this problem with a vibrating glass ring that interacts with light. They thus created a microscale circulator that directionally routes light on an optical chip without using magnets.  Researchers have discovered three distinct variants of magnetic domain walls in the helimagnet iron germanium (FeGe).  Magnetic materials that form helical structures—coiled shapes comparable to a spiral staircase or the double helix strands of a DNA molecule—occasionally exhibit exotic behavior that could improve information processing in hard drives and other digital devices.  In a new study, researchers have designed "invisible" magnetic sensors—sensors that are magnetically invisible so that they can still detect but do not distort the surrounding magnetic fields.  At Carnegie Mellon University, Materials Science and Engineering Professor Mike McHenry and his research group are developing metal amorphous nanocomposite materials (MANC), or magnetic materials whose nanocrystals have been grown out of an amorphous matrix to create a two phase magnetic material that exploits
Comments: 58 Pages.
[v1] 2018-11-09 10:04:25
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