Second-order phase transition at the phase boundary through the FeRh first-order metamagnetic phase transition

Massey, J. R. et al. (2019) Second-order phase transition at the phase boundary through the FeRh first-order metamagnetic phase transition. arXiv, (Unpublished)

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The phase coexistence present through first-order phase transitions implies the presence of phase boundary walls, which can be of finite size. Better understanding of the phase boundary wall properties will provide an insight into the dynamics of first-order phase transitions. Here, by combining x-ray photon correlation spectroscopy investigations with magnetometry measurements of magnetic relaxation through the thermally activated first-order metamagnetic phase transition present in the B2-ordered FeRh alloy, we are able to isolate the dynamic behaviour of the phase boundary wall present in this system. These investigations reveal a change in the nature of the dynamic behaviour and critical scaling of the relaxation time centred around the point of maximum phase coexistence within the phase transition. All of this behaviour can be attributed to the introduction of exchange coupling across the phase boundary wall and raises questions about the role of latent heat in dynamic behaviour of this region.

Item Type:Articles
Glasgow Author(s) Enlighten ID:McVitie, Professor Stephen and McGrouther, Dr Damien and Almeida, Dr Trevor and LAMB, Raymond
Authors: Massey, J. R., Temple, R. C., Almeida, T. P., Lamb, R., Peters, N. A., Campion, R. P., Fan, R., McGrouther, D., McVitie, S., Steadman, P., and Marrow, C. H.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:arXiv
Copyright Holders:Copyright © 2019 The Authors
Publisher Policy:Reproduced with the permission of the Author

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
171224Current-driven domain wall motion and magnetomemristance in FeRh-based nanostructuresStephen McVitieEngineering and Physical Sciences Research Council (EPSRC)EP/M019020/1P&S - Physics & Astronomy