Interface magnetism and superparamagnetism of Co/Cu multilayers

Authors

Z.S. Shan, University of Nebraska - Lincoln
S. Nafis, University of Nebraska - Lincoln
John A. Woollam, University of Nebraska-LincolnFollow
Sy_Hwang Liou, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow

Date of this Version

5-15-1993

Comments

Published by American Institute of Physics. J. Appl. Phys., 73, 6347(1993). © 1993 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

The magnetic properties of Co/Cu multilayers were investigated from 5 to 380 K and analyzed in terms of the interface magnetism and mean-field model. The interface, which is about 1.2 Å thick, is nonmagnetic at room temperature and becomes magnetic at 5 K with the average magnetization of 40% of the pure Co magnetization. The samples of X Å Co/10 Å Cu behaved superparamagnetically as X ranged from 4 to 6.5 Å and did not show superparamagnetic behavior for thinner or thicker Co layer thickness.