Chen, T.
, Chien, C.
, Huang, S.
and Stiles, M.
(2006),
Enhanced Magnetoresistance Induced by Spin Transfer Torque in Granular Films with a Magnetic Field, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=620583
(Accessed September 11, 2024)
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Enhanced Magnetoresistance Induced by Spin Transfer Torque in Granular Films with a Magnetic Field
Published
Author(s)
Tingyong Chen, C Chien, Suber Huang,
Abstract
Spin-transfer torques (STT) provide a mechanism to alter the magnetic configurations of magnetic heterostructures, a result previously only achieved by an external magnetic field. In granular solids, we demonstrate a new form of STT effect that can be exploited to induce a large spin disorder when combined with a large magnetic field. As a result, we have obtained a very large magnetoresistance effect in excess of 400% at 4.2 K in a large magnetic field, the largest ever reported in any metallic systems. The STT characteristics of granular solids differ significantly from those of multilayers, showing no STT effect at low magnetic fields but prominent STT effects at high fields.Citation
Physical Review Letters
Volume
96
Issue
20
Pub Type
Journals
Download Paper
Keywords
granular materials, magnetoresistance, non-collinear magnetization, point-contact spectroscopy, spin-transfer torques
Citation
Issues
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Created May 25, 2006, Updated October 14, 2021