Spinmotive forces and torque transfer in spin valves

Stewart E. Barnes

doi:10.1063/1.2355274

Spinmotive forces and torque transfer in spin valves

Stewart E. Barnes

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

That the magnetization of the free layer of a spin valve is being "measured" is reflected in the angular dependence of the torque transfer term, which then differs from that given by Sloncewski. The usual form of the Gilbert relaxation term is not consistent with the second law of thermodynamics. When the usual derivative is replaced by a "particle derivative", relaxation is consistent with this law. It is implied that static solutions in which relaxation balances the torque transfer term are possible. Discussed is the concept of a spin-motive-force arising from the non-conservative part of the Stern-Gerlach force. This gives a real meaning to the term "spin-battery" and a spin inductance.

Original language	English (US)
Title of host publication	LOW TEMPERATURE PHYSICS
Subtitle of host publication	24th International Conference on Low Temperature Physics - LT24
Pages	1504-1505
Number of pages	2
DOIs	https://doi.org/10.1063/1.2355274
State	Published - Dec 1 2006
Event	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 - Orlando, FL, United States Duration: Aug 10 2006 → Oct 17 2006

Publication series

Name	AIP Conference Proceedings
Volume	850
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Other

Other	LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24
Country	United States
City	Orlando, FL
Period	8/10/06 → 10/17/06

Keywords

Measurements
Spin valve
Spin-battery
Spin-motive-force
Spintronics

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.2355274

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Cite this

Barnes, S. E. (2006). Spinmotive forces and torque transfer in spin valves. In LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24 (pp. 1504-1505). (AIP Conference Proceedings; Vol. 850). https://doi.org/10.1063/1.2355274

Barnes, SE 2006, Spinmotive forces and torque transfer in spin valves. in LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24. AIP Conference Proceedings, vol. 850, pp. 1504-1505, LOW TEMPERATURE PHYSICS: 24th International Conference on Low Temperature Physics - LT24, Orlando, FL, United States, 8/10/06. https://doi.org/10.1063/1.2355274

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N2 - That the magnetization of the free layer of a spin valve is being "measured" is reflected in the angular dependence of the torque transfer term, which then differs from that given by Sloncewski. The usual form of the Gilbert relaxation term is not consistent with the second law of thermodynamics. When the usual derivative is replaced by a "particle derivative", relaxation is consistent with this law. It is implied that static solutions in which relaxation balances the torque transfer term are possible. Discussed is the concept of a spin-motive-force arising from the non-conservative part of the Stern-Gerlach force. This gives a real meaning to the term "spin-battery" and a spin inductance.

AB - That the magnetization of the free layer of a spin valve is being "measured" is reflected in the angular dependence of the torque transfer term, which then differs from that given by Sloncewski. The usual form of the Gilbert relaxation term is not consistent with the second law of thermodynamics. When the usual derivative is replaced by a "particle derivative", relaxation is consistent with this law. It is implied that static solutions in which relaxation balances the torque transfer term are possible. Discussed is the concept of a spin-motive-force arising from the non-conservative part of the Stern-Gerlach force. This gives a real meaning to the term "spin-battery" and a spin inductance.

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KW - Spin-battery

KW - Spin-motive-force

KW - Spintronics

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