Ordering in a spin glass under applied magnetic field

Abstract

Torque, torque relaxation, and magnetization measurements on a AuFe spin glass sample are reported. The experiments carried out up to 7 T show a transverse irreversibility line in the (H,T) plane up to high applied fields, and a distinct strong longitudinal irreversibility line at lower fields. The data demonstrate for that this type of sample, a Heisenberg spin glass with moderately strong anisotropy, the spin glass ordered state survives under high applied fields in contrast to predictions of certain "droplet" type scaling models. The overall phase diagram closely ressembles those of mean field or chiral models, which both have replica symmetry breaking transitions.

4 pages, 3 figures, accepted for PRL

References in corpus (2)

• Memory and Chaos Effects in Spin Glasses
• Dynamical simulation of spin-glass and chiral-glass orderings in three-dimensional Heisenberg spin glasses

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