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Whirlpools on the Nanoscale Could Multiply Magnetic Memory

At the Advanced Light Source, Berkeley Lab scientists join an international team to control spin orientation in magnetic nanodisks

“We spent 15 percent of home energy on gadgets in 2009, and we’re buying more gadgets all the time,” says Peter Fischer of the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab). Fischer lets you know right away that while it’s scientific curiosity that inspires his research at the Lab’s Advanced Light Source (ALS), he intends it to help solve pressing problems.

“What we’re working on now could make these gadgets perform hundreds of times better and also be a hundred times more energy efficient,” says Fischer, a staff scientist in the Materials Sciences Division. As a principal investigator at the Center for X-Ray Optics, he leads ALS beamline 6.1.2, where he specializes in studies of magnetism. (more…)

New Phenomenon in Nanodisk Magnetic Vortices

By Guest PostAugust 12, 2012Scienceals, antisymmetric coupling, atom, cxro, data storage, dzyaloshinskii moriya interaction, eye of hurricane, ferromagnetic nanodisk, hurricane, intrinsic factor, Japan, keisuke yamada, magnetic vortices, magnetism, mi young im, nanodisk, nanoscience, peter fischer, phenomenon, ram, shinya kasai, spin of electrons, symmetry, teruo ono, tomonori sato, xray beams, yoshinobu nakatani

Berkeley Lab Researchers Take a Mesocale Look at Magnetic Vortex Formations

The phenomenon in ferromagnetic nanodisks of magnetic vortices – hurricanes of magnetism only a few atoms across – has generated intense interest in the high-tech community because of the potential application of these vortices in non-volatile Random Access Memory (RAM) data storage systems. New findings from scientists at the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) indicate that the road to magnetic vortex RAM might be more difficult to navigate than previously supposed, but there might be unexpected rewards as well.

In an experiment made possible by the unique X-ray beams at Berkeley Lab’s Advanced Light Source (ALS), a team of researchers led by Peter Fischer and Mi-Young Im of the Center for X-Ray Optics (CXRO), in collaboration with scientists in Japan, discovered that contrary to what was previously believed, the formation of magnetic vortices in ferromagnetic nanodisks is an asymmetric phenomenon. It is possible that this breaking of symmetry would lead to failure in a data storage device during its initialization process. (more…)

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Whirlpools on the Nanoscale Could Multiply Magnetic Memory

New Phenomenon in Nanodisk Magnetic Vortices