Magnetization reversal and confinement effects across the metamagnetic phase transition in mesoscale FeRh structures

Arregi, Jon Ander; Horký, Michal; Fabianová, Kateřina; Tolley, Robert; Fullerton, Eric E.; Uhlíř, Vojtěch

doi:10.1088/1361-6463/aaaa5a

Title: Magnetization reversal and confinement effects across the metamagnetic phase transition in mesoscale FeRh structures

Journal Article · 14 February 2018 · Journal of Physics. D, Applied Physics

DOI: https://doi.org/10.1088/1361-6463/aaaa5a · OSTI ID:1547292

^[1]; Horký, Michal ^[2]; Fabianová, Kateřina ^[2]; Tolley, Robert ^[3];

^[3];

^[2]

Brno Univ. of Technology (Czech Republic); None
Brno Univ. of Technology (Czech Republic)
Univ. of California, San Diego, CA (United States)

The results of mesoscale confinement on the metamagnetic behavior of lithographically patterned FeRh structures are investigated via Kerr microscopy. Combining the temperature- and field-dependent magnetization reversal of individual sub-micron FeRh structures provides specific phase-transition characteristics of single mesoscale objects. Relaxation of the epitaxial strain caused by patterning lowers the metamagnetic phase transition temperature by more than 15 K upon confining FeRh films below 500 nm in one lateral dimension. We also discuss that the phase transition becomes highly asymmetric when comparing the cooling and heating cycles for 300 nm-wide FeRh structures. The investigation of FeRh under lateral confinement provides an interesting platform to explore emergent metamagnetic phenomena arising from the interplay of the structural, magnetic and electronic degrees of freedom at the mesoscopic length scale.

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Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: Grant Agency of the Czech Republic; Ministry of Education, Youth and Sports of the Czech Republic; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: SC0003678

OSTI ID:: 1547292

Journal Information:: Journal of Physics. D, Applied Physics, Journal Name: Journal of Physics. D, Applied Physics Journal Issue: 10 Vol. 51; ISSN 0022-3727

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Antiferromagnetic-ferromagnetic phase domain development in nanopatterned FeRh islands Temple, R. C.; Almeida, T. P.; Massey, J. R. Physical Review Materials, Vol. 2, Issue 10 https://doi.org/10.1103/physrevmaterials.2.104406	journal	October 2018
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