Tuesday, September 17th, 2013
Western Digital, 1710 Automation Parkway, San Jose, CA
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Pizza too at 6:45 P.M.
Presentation at 7:30 P.M.
Advanced spintronic materials for generation and control of spin current
Dr. Koki Takanashi
IEEE Distinguished Lecturer
Institute for Materials Research (IMR)
Tohoku University
Abstract
“Spin current”, i.e., the flow of spin angular momentum, in magnetic
nanostructures has emerged as a fascinating physical concept during the
recent development of spintronics. In magnetic nanostructures, magnetism
correlates strongly with electronic transport and also other physical
properties, leading to the mutual control of magnetic, transport, and
other physical properties. Spin current is the most basic concept relevant
to the mutual control, and efficient generation and precise control of
spin current in magnetic nanostructures are key technologies for the
further development of spintronics [1]. There are two kinds of spin
current: one is accompanied by an electric current, and the other is not.
Spin current without an electric current is called pure spin current,
which is actually generated by several experimental methods such as non-
local spin injection, spin Hall effect, spin pumping, spin Seebeck effect,
and so on. For recent years spin current has been extensively
investigated, and particularly the understanding of pure spin current has
dramatically developed.
In this lecture the concept, historical
background, and recent progress in research of spin current will be
reviewed, and then some topics on advanced materials for the generation
and control of spin current will be introduced, with a focus on magnetic
ordered alloys: half-metallic Heusler alloys as a highly efficient spin
injector/detector and L10-ordered alloys with high magnetic anisotropy as
a perpendicularly polarized spin injector/detector.
[1] K. Takanashi, Jpn. J. Appl. Phys., 49 (2010) 110001.
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