Eur. Phys. J. B 66, 369-373 (2008)
https://doi.org/10.1140/epjb/e2008-00426-0

The study of spin ordering in FM/AFM bilayers with a mixed interface

¹ School of Material science and engineering, HeBei University of Technology, TianJin, 300130, P.R. China
² College of Physics and Information Engineering, Henan Normal University, Xinxiang, 453007, P.R. China

Corresponding author: ^a admat@jsmail.hebut.edu.cn

Received: 3 May 2008
Revised: 27 September 2008
Published online: 29 November 2008

Abstract

Monte Carlo simulation is adopted to study the spin ordering in ferromagnet(FM)/antiferromagnet(AFM) bilayers with a mixed interface. We introduce the time-dependent autocorrelation function to describe the thermal stability of the spin ordering for each plane, especially the interface, in FM/AFM bilayers with uncompensated and compensated AFM surfaces. It is found that the thermal decay of spin ordering depends on the plane, the interface coupling and the interface roughness. For the uncompensated AFM surfaces, when the interface coupling is small, the thermal decay of spin ordering is faster at the interface than other planes, while the large interfae coupling makes the spin ordering at the interface become relatively stable. In the case of compensated AFM surfaces, the spin ordering at the interface is thermally disordered much before that at other planes, and the thermal decay becomes slow gradually as the interface coupling increases.