Magnetism of sigma-phase Fe-Mo alloys: ac magnetic susceptibility study
J. Przewoznik, S. M. Dubiel
TL;DR
This study investigates the magnetic properties of sigma-phase Fe-Mo alloys using ac magnetic susceptibility, revealing a spin glass state with heterogeneous characteristics and specific temperature ranges.
Contribution
It provides new insights into the magnetic ground state of sigma-phase Fe-Mo alloys, identifying a spin glass phase and its heterogeneity through susceptibility measurements.
Findings
Spin glass state identified in Fe-Mo alloys
Spin glass temperature varies with composition
Heterogeneous spin glass with distinct domains
Abstract
A series of four sigma-Fe(100-x)Mo(x) samples was investigated with ac magnetic susceptibility measurements. An evidence was found that the ground magnetic state of the samples is constituted by a spin glass (SG) with the spin glass temperature ranging between ca. 34K for x=47 and ca. 16K for x=53. The SG state is heterogeneous and it can be divided into a weak-irreversibility and a strong-irreversibility domains. Its figures of merit are typical of metallic (canonical) spin glasses.
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