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Relaxation in a spin glass system with competing magnetic interactions: Fe 0.16 Cr 0.84

1982; IOP Publishing; Volume: 15; Issue: 24 Linguagem: Inglês

10.1088/0022-3719/15/24/007

1747-3802

A. C. Palumbo, R. D. Parks, Y. Yeshurun,

Material Dynamics and Properties

The authors present magnetic relaxation measurements in the spin glass Fe0.16Cr0.84 as a function of temperature (1.5K<or=T<or=7.5K) and magnetic field (100 Oe<or=H<or=3 kOe). The relaxation rate is described by a power law where the exponent a depends on temperature and field. They find that all a(H,T) collapse to a single curve when plotted as a function of H/Hs, where Hs is a temperature-dependent scaling parameter. This curve can be extrapolated to give a=0 at a critical field Hc(T) which they identify as the de Almeida-Thouless line.