Domain Structure and Magnetization Reversal Micromechanisms in Quasi-Two-Dimensional Exchange-Biased Nanomagnetics


Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

Abstract—The domain structure and magnetization reversal mechanisms are studied in quasi-two-dimensional exchange-biased NiFe/FeMn and NiFe/NiO nanomagnetics, using a complex method of magnetooptical indicator films and acoustic emission. The presence of the axial dispersion of unidirectional anisotropy in grains of the antiferromagnetic layer is shown to determine the statistic distribution and chirality of spin springs near the interface. The acoustic emission signals caused by the excitation of elastic Lamb waves upon the magnetization reversal of NiFe/NiO heterostructure are found. The coercive force of these systems is due to irreversible processes to overcome potential barriers that are induced by the formation of spin springs with different chirality, localized in the antiferromagnetic near the ferromagnetic–antiferromagnetic boundary.

About the authors

V. S. Gornakov

Institute of Solid State Physics, Russian Academy of Sciences

Author for correspondence.
Email: gornakov@issp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

I. V. Shashkov

Institute of Solid State Physics, Russian Academy of Sciences

Email: gornakov@issp.ac.ru
Russian Federation, Chernogolovka, Moscow oblast, 142432

M. A. Lebyodkin

Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Université de Lorraine,
CNRS, Arts et Métiers ParisTech

Email: gornakov@issp.ac.ru
France, Metz

T. A. Lebedkina

Laboratoire d’Etude des Microstructures et de Mécanique des Matériaux, Université de Lorraine,
CNRS, Arts et Métiers ParisTech

Email: gornakov@issp.ac.ru
France, Metz

Supplementary files

Supplementary Files
Action
1. JATS XML

Copyright (c) 2018 Pleiades Publishing, Ltd.