Magnetic ordering and local random anisotropy in dilute magnetic glasses

Authors

G.R. Gruzalski, University of Nebraska - Lincoln
J.D. Patterson, University of Nebraska - Lincoln
David J. Sellmyer, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

March 1978

Comments

Published by American Institute of Physics. J. Applied Physics 49, 1696 (1978). © 1978 American Institute of Physics. Permission to use. http://jap.aip.org/jap/.

Abstract

Magnetic susceptibility and high-field magnetization measurements are presented for amorphous Zr₄₀Cu_60-xM_x (M denoting Fe, Mn, Gd, and Tb) and Nb₅₀Ni_50-xFe_x, with x ranging from zero to about ten. The alloys for M=Gd, Tb, and Fe develop low-temperature ordered states that are characterized as spin glass like, whereas the Mn alloy exhibits no evidence of order down to 1.3 K. The magnetic properties of these alloys are discussed in terms of local random anisotropy, fluctuations in the interimpurity exchange interactions, extremely short electron-mean-free paths, antiferromagnetic interactions between the localized moments and the conduction electrons, and moment instabilities. Journal of Applied Physics is copyrighted by The American Institute of Physics.