Magnetically dilute metallic glasses. I. 3d moments

Authors

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

Date of this Version

July 1979

Comments

Published by American Physical Society. Phys. Rev. B 20, 184 (1979). http://prb.aps.org. Copyright © 1979 American Physical Society. Permission to use.

Abstract

Magnetic-susceptibility and high-field magnetization measurements are presented for amorphous Zr₄₀Cu₅₀M₁₀ (M denoting Fe, Mn) and Nb₅₀Ni_50-xFe_x, with x ranging from zero to about ten. Curie-Weiss fits to the susceptibility data were made to determine effective moments p_eff and paramagnetic Weiss temperatures, ⊖. The small values of p_eff suggest the presence of moment instabilities depending on local environment, and the negative ⊖ values suggest antiferromagnetic local-moment-conduction-electron interactions. The Fe alloys develop hysteresis at low temperatures indicating the presence of a magnetically ordered state. These alloys can be characterized as cluster glasses because of the apparent importance of magnetic clusters and the development of an ordered state of spin-glass character. However, the Mn alloys show no evidence of magnetic order down to 1.3 K.