Spin Glasses in Transition?

Abstract

Spin glasses have variously been described as apparently frozen but very slowly relaxing spin systems, and also as magnetic phases below a second order transition. The structural and dynamic properties of metallic spin glasses are surveyed with emphasis on neutron scattering and low field magnetic measurements. Spin glass regions in phases with magnetic long range order are included, and an attempt is made to assess spin glass theories with respect to the various transitions.

Revisiting neutron studies of reentrant spin glasses: the role of small-angle scattering

“…The measurement of the EA parameter [q EA defined by equation ( 3)] which develops below T F is not directly accessible to neutron diffraction, namely without energy analysis of the diffracted neutron beam (Hicks, 1983). On the other hand, the evolution of the spin dynamics can be followed above and below T F using neutron spin echo (NSE) or quasi-elastic neutron scattering (QENS).…”

An Introduction to Mössbauer Studies of Magnetic Materials

“…The nature of the magnetic transition to a spin glass state is still unclear, as is the manner in which a spin glass phase merges or coexists with a phase exhibiting long-range magnetic order [for an appraisal of the spin glass transition see Hicks (1983) and Fischer (1983)]. The AuFe system is a classic example of such a mixed magnetic system and Fig.…”