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Complex magnetic response in magnetic tunnel junctions determined via magnetic and transport measurements

Published online by Cambridge University Press:  10 February 2011

R. Guerrero ,
V. V. Pryadun ,
F. G. Aliev ,
R. Villar ,
J. L. Martinez  and
J. Moodera
R. Guerrero
Affiliation:
Dpto. de Fisica de la Materia Condensada, C-III, Universidad Autonoma de Madrid, 28049, Madrid, Spain
V. V. Pryadun
Affiliation:
Dpto. de Fisica de la Materia Condensada, C-III, Universidad Autonoma de Madrid, 28049, Madrid, Spain
F. G. Aliev*
Affiliation:
Dpto. de Fisica de la Materia Condensada, C-III, Universidad Autonoma de Madrid, 28049, Madrid, Spain
R. Villar
Affiliation:
Dpto. de Fisica de la Materia Condensada, C-III, Universidad Autonoma de Madrid, 28049, Madrid, Spain
J. L. Martinez
Affiliation:
ICMM-CSIC, Cantoblanco, 28049, Madrid, Spain
J. Moodera
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA
*
*[email protected]
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Abstract

We have studied the low frequency complex magnetization dynamics in Co/Al2O3/Ni80Fe20 magnetic tunnel junctions (MTJs) at temperatures between 4.2K and 300K. The measurements were carried out by using two different experimental techniques. The first method probes directly magnetic properties via DC magnetization and AC susceptibility, while the second one measures AC magnetization dynamics of the ferromagnetic electrodes near the cross area, which is related to the tunnelling resistance.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 746: Symposia Q/R – Magnetoelectronics-Novel Magnetic Phenomena in Nanostructures – Advanced Characterization of Artificially Structured Magnetic Materials , 2002 , Q2.9
Copyright
Copyright © Materials Research Society 2003

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