Effective temperature and magnetization reversal induced by spin injection

Jean-Eric Wegrowe

doi:10.1117/12.549579

25 May 2004 Effective temperature and magnetization reversal induced by spin injection

Jean-Eric Wegrowe

Proceedings Volume 5469, Fluctuations and Noise in Materials; (2004) https://doi.org/10.1117/12.549579
Event: Second International Symposium on Fluctuations and Noise, 2004, Maspalomas, Gran Canaria Island, Spain

Abstract

Experiments of spin injection on magnetic nanostructures show that the magnetization can be switched with high current pulses, and without the need of a magnetic field. The mechanism responsible for this effect is still not known, but some experiments show that it is related to fluctuations and noise in magnetic systems. The response of a magnetic nanostructure shows typical processes of activation out of a metastable state and two level fluctuations. An effective temperature is measured is measured through the effective barrier variation. The effective temperature depends on the magnetic configuration and to the current direction. This approach leads to conclude that the transfer of energy is due to a transfer of spin from the current to the magnetization. A new mechanism is proposed as a consequence of the s-d relaxation at the interface in 3d ferromagnets. This mechanism couples the electronic transport (Boltzmann equations) to the dynamics of the magnetization (Landau-Lifshitz-Gilbert equation).

Citation Download Citation

Jean-Eric Wegrowe "Effective temperature and magnetization reversal induced by spin injection", Proc. SPIE 5469, Fluctuations and Noise in Materials, (25 May 2004); https://doi.org/10.1117/12.549579

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available