Magnetic Glass formed by kinetic arrest of first order phase transitions

TL;DR

This paper discusses the formation of magnetic glasses through kinetic arrest of first-order phase transitions, highlighting their unique properties and the ability to tune their transition temperatures via magnetic fields.

Contribution

It introduces the concept of magnetic glasses formed by kinetic arrest, emphasizing their distinct properties and the influence of magnetic fields on their transition temperatures.

Findings

Magnetic glasses exhibit both structural and magnetic long-range order.

Their transition temperatures Tc and Tg can be tuned by varying the magnetic field H.

Magnetic glasses show relaxation and specific heat behaviors similar to structural glasses.

Abstract

Metallic glasses are formed by splat-cooling; this ensures that atomic motions are arrested before the latent heat of solidification can be extracted. Glass is defined as a higher disorder metastable state with arrested kinetics. Arrested kinetics is a defining property of a glass, rather than structural disorder as, e.g., in amorphous silicon [1]. `Magnetic glasses' identified recently possess structural as well as magnetic long-range order, but show relaxation and specific heat as for a structural glass [1]. The values of Tc and Tg in these materials are easily varied by varying the magnetic field H, allowing one to go from metallic glass to glass former like scenario.