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This news release, written by Laura Millsaps at Ames Laboratory, is being jointly issued by the U.S. Department of Energy’s Ames Laboratory and Brookhaven National Laboratory. Brookhaven Lab media contacts: Ariana Manglaviti, 631-344-2347, amanglaviti@bnl.gov or Peter Genzer, 631-344-3174, genzer@bnl.gov; Ames Lab media contact: Laura Millsaps, 515-294-3474, millsaps@ameslab.gov.
Light-induced Twisting of Weyl Nodes Switches on Giant Electron Current
January 18, 2021
Collaborating scientists at the U.S. Department of Energy s Ames Laboratory, Brookhaven Laboratory and the University of Alabama Birmingham used laser pulses to twist the crystal lattice of a Weyl semimetal, switching on a giant electron current that appears to be nearly dissipationless. The discovery and control of such properties brings these materials another step closer to use in applications such as quantum computing.
Making it tougher: Samarium cobalt magnet improvements planned in Ames Lab partnership
Ames Laboratory will partner with Electron Energy Corporation to improve a mainstay of magnet technology the samarium cobalt (SmCo) magnet.
Since their development in the 1960s, SmCo magnets have been a workhorse in modern technology, second only in strength to neodymium magnets. They are extremely resistant to demagnetization, and able to withstand high heat and corrosion.
That high magnetic power density and excellent temperature stability has made SmCo magnets the first choice for many uses, including military, spacecraft, aerospace, and marine applications.
The one downside to SmCo magnets? They are brittle. The process by which they are made, pressing metal powder into a solid mass, called sintering, makes them susceptible to chipping and fractures during the manufacturing process, as well as failure in any environment where there is too much vibration or mechanical shock.