How to transfer spins from the electric current to the ferromagnetic degree of freedom?

J. E. Wegrowe; H. J. Drouhin

doi:10.1117/12.828052

How to transfer spins from the electric current to the ferromagnetic degree of freedom?

J. E. Wegrowe
, H. J. Drouhin

CEA/DSM/IRAMIS

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

Abstract

We present the last developments of the approach of spin-transfer in terms of mesoscopic non-equilibrium thermodynamics. The modification of the ferromagnetic states due to the presence of a spin-accumulation process is investigated. The spin accumulation (also responsible for giant magnetoresistance) is generated by an electric current at the interfaces with a ferromagnetic nanostructure. The dynamical coupling that links the ferromagnetic degree of freedom to the spin of the conduction electrons is investigated with taking into account longitudinal and transverse spin accumulation. It seems that the coupling with the transverse spin-accumulation may be equivalent to the usual spin-transfer-torque mechanisms deduced from microscopic transmission-reflection coefficients at the interface. In contrast, the coupling with the longitudinal spin-accumulation generates fluctuations and seems to play important role in the activation process at larger time scales only.

Original language	English
Title of host publication	Spintronics II
DOIs	https://doi.org/10.1117/12.828052
Publication status	Published - 23 Nov 2009
Externally published	Yes
Event	Spintronics II - San Diego, CA, United States Duration: 2 Aug 2009 → 5 Aug 2009

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	7398
ISSN (Print)	0277-786X

Conference

Conference	Spintronics II
Country/Territory	United States
City	San Diego, CA
Period	2/08/09 → 5/08/09

Keywords

Giant magnetoresistance
Magnetic nanostructures
Spin accumulation
Spin transfer

Access to Document

10.1117/12.828052

Cite this

@inproceedings{a200860a70444fb6ad927af7d1279f75,

title = "How to transfer spins from the electric current to the ferromagnetic degree of freedom?",

abstract = "We present the last developments of the approach of spin-transfer in terms of mesoscopic non-equilibrium thermodynamics. The modification of the ferromagnetic states due to the presence of a spin-accumulation process is investigated. The spin accumulation (also responsible for giant magnetoresistance) is generated by an electric current at the interfaces with a ferromagnetic nanostructure. The dynamical coupling that links the ferromagnetic degree of freedom to the spin of the conduction electrons is investigated with taking into account longitudinal and transverse spin accumulation. It seems that the coupling with the transverse spin-accumulation may be equivalent to the usual spin-transfer-torque mechanisms deduced from microscopic transmission-reflection coefficients at the interface. In contrast, the coupling with the longitudinal spin-accumulation generates fluctuations and seems to play important role in the activation process at larger time scales only.",

keywords = "Giant magnetoresistance, Magnetic nanostructures, Spin accumulation, Spin transfer",

author = "Wegrowe, \{J. E.\} and Drouhin, \{H. J.\}",

year = "2009",

month = nov,

day = "23",

doi = "10.1117/12.828052",

language = "English",

isbn = "9780819476883",

series = "Proceedings of SPIE - The International Society for Optical Engineering",