Publication detail

Phase Coexistence and Kinetic Arrest in the Magnetostructural Transition of the Ordered Alloy FeRh

Keavney, D. Choi, Y. Holt, M. Uhlíř, V. Arena, D. Fullerton, E. Ryan, P. Kim, J.

Original Title

Phase Coexistence and Kinetic Arrest in the Magnetostructural Transition of the Ordered Alloy FeRh

Type

journal article in Web of Science

Language

English

Original Abstract

In materials where two or more ordering degrees of freedom are closely matched in their free energies, coupling between them, or multiferroic behavior can occur. These phenomena can produce a very rich phase behavior, as well as emergent phases that offer useful properties and opportunities to reveal novel phenomena in phase transitions. The ordered alloy FeRh undergoes an antiferromagnetic to ferromagnetic phase transition at ~375 K, which illustrates the interplay between structural and magnetic order mediated by a delicate energy balance between two configurations. We have examined this transition using a combination of high-resolution x-ray structural and magnetic imaging and comprehensive x-ray magnetic circular dichroism spectroscopy. We find that the transition proceeds via a defect-driven domain nucleation and growth mechanism, with significant return point memory in both the structural and magnetic domain configurations. The domains show evidence of inhibited growth after nucleation, resulting in a quasi-2nd order temperature behavior.

Keywords

FeRh; critical behavior; x-ray magnetic circular dichroism; phase transition

Authors

Keavney, D.; Choi, Y.; Holt, M.; Uhlíř, V.; Arena, D.; Fullerton, E.; Ryan, P.; Kim, J.

Released

1. 12. 2018

ISBN

2045-2322

Periodical

Scientific Reports

Year of study

8

Number

1778

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

7

Pages count

7

BibTex

@article{BUT153340,
  author="Keavney, D. and Choi, Y. and Holt, M. and Uhlíř, V. and Arena, D. and Fullerton, E. and Ryan, P. and Kim, J.",
  title="Phase Coexistence and Kinetic Arrest in the Magnetostructural Transition of the Ordered Alloy FeRh",
  journal="Scientific Reports",
  year="2018",
  volume="8",
  number="1778",
  pages="1--7",
  doi="10.1038/s41598-018-20101-0",
  issn="2045-2322"
}