Spin Glass Phase in Spin-Density-Wave Cr–Co Alloys

Authors

V. Yu. Galkin, Bardin Institute for Ferrous Metallurgy
N. Ali, Southern Illinois University Carbondale
W. A. Ortiz, Universidade Federal de São Carlos
E. Fawcett, University of Toronto

Comments

© 2001 American Institute of Physics

Published in Journal of Applied Physics, Vol. 89 No. 11 (2001) at doi: 10.1063/1.1362651

Abstract

A spin glass (SG) phase was observed in the spin-density wave (SDW) alloys Cr_1−xCo_x at high Co concentrations (x≥13%). After zero-field cooling, the temperature dependence of the magnetization M(T) of Cr_0.87Co_0.13 and Cr_0.85Co_0.15, measured in an applied field H=100 Oe with a SQUID magnetometer, exhibits a low T maximum, characteristic of a SG. Cooling in the measuring field, however, gives quite a different behavior. The field dependence of the magnetization M(H) is nonlinear, with a pronounced hysteresis. A strong time relaxation M(t) is also an indication of a SG phase. SG in Cr_1−xCo_x is formed at high impurity concentrations, possibly due to clustering of the magnetic impurities.

Recommended Citation

Galkin, V. Y., Ali, N., Ortiz, W. A. and Fawcett, E.. "Spin Glass Phase in Spin-Density-Wave Cr–Co Alloys." (Jun 2001).