Using Ferromagnetic Resonance as a Sensitive Method to Study Temperature Dependence of Interlayer Exchange Coupling

Z. Zhang; L. Zhou; P. E. Wigen; K. Ounadjela

doi:10.1103/PhysRevLett.73.336

Using Ferromagnetic Resonance as a Sensitive Method to Study Temperature Dependence of Interlayer Exchange Coupling

Z. Zhang, L. Zhou, P. E. Wigen, and K. Ounadjela

Phys. Rev. Lett. 73, 336 – Published 11 July 1994

Abstract

We have developed longitudinal pumping and angular dependent ferromagnetic resonance techniques to investigate the temperature dependence of the interlayer exchange field $H_{ex}$ on a series of Co/Ru/Co trilayer films. Our results indicate, for the first time, that the variation of $H_{ex}$ with temperature follows roughly the relationship $H_{ex} \frac{\propto (\frac{T}{T_{0}})}{sinh (\frac{T}{T_{0}})}$ as predicted by theoretical models. In addition, no evidence of the biquadratic exchange term was observed in these samples.

Received 27 December 1993

DOI:https://doi.org/10.1103/PhysRevLett.73.336

Authors & Affiliations

Z. Zhang¹, L. Zhou¹, P. E. Wigen¹, and K. Ounadjela²

¹Department of Physics, The Ohio State University, Columbus, Ohio 43210
²Institut de Physique et de Chimie de Strasbourg, 23 rue du Loess, 67037 Strasbourg, France