Publication detail

Magnetic-field-controlled growth of magnetoelastic phase domains in FeRh

ARREGI URIBEETXEBARRIA, J. RINGE, F. HAJDUČEK, J. GOMONAY, O. MOLNÁR, T. JASKOWIEC, J. UHLÍŘ, V.

Original Title

Magnetic-field-controlled growth of magnetoelastic phase domains in FeRh

Type

journal article in Web of Science

Language

English

Original Abstract

Magnetic phase transition materials are relevant building blocks for developing green technologies such as magnetocaloric devices for solid-state refrigeration. Their integration into applications requires a good understanding and controllability of their properties at the micro- and nanoscale. Here, we present an optical microscopy study of the phase domains in FeRh across its antiferromagnetic-ferromagnetic phase transition. By tracking the phase-dependent optical reflectivity, we establish that phase domains have typical sizes of a few microns for relatively thick epitaxial films (200 nm), thus enabling visualization of domain nucleation, growth, and percolation processes in great detail. Phase domain growth preferentially occurs along the principal crystallographic axes of FeRh, which is a consequence of the elastic adaptation to both the substrate-induced stress and laterally heterogeneous strain distributions arising from the different unit cell volumes of the two coexisting phases. Furthermore, we demonstrate a magnetic-field-controlled directional growth of phase domains during both heating and cooling, which is predominantly linked to the local effect of magnetic dipolar fields created by the alignment of magnetic moments in the emerging (disappearing) FM phase fraction during heating (cooling). These findings highlight the importance of the magnetoelastic character of phase domains for enabling the local control of micro- and nanoscale phase separation patterns using magnetic fields or elastic stresses.

Keywords

first-order phase transition; FeRh; magnetic phase domains; magnetostriction; optical microscopy

Authors

ARREGI URIBEETXEBARRIA, J.; RINGE, F.; HAJDUČEK, J.; GOMONAY, O.; MOLNÁR, T.; JASKOWIEC, J.; UHLÍŘ, V.

Released

1. 6. 2023

Publisher

IOP Publishing

Location

BRISTOL

ISBN

2515-7639

Periodical

Journal of Physics: Materials

Year of study

6

Number

3

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

15

Pages count

15

URL

https://iopscience.iop.org/article/10.1088/2515-7639/acce6f

Full text in the Digital Library

http://hdl.handle.net/11012/213682

BibTex

@article{BUT183953,
  author="Jon Ander {Arregi Uribeetxebarria} and Friederike {Ringe} and Jan {Hajduček} and Olena {Gomonay} and Tomáš {Molnár} and Jiří {Jaskowiec} and Vojtěch {Uhlíř}",
  title="Magnetic-field-controlled growth of magnetoelastic phase domains in FeRh",
  journal="Journal of Physics: Materials",
  year="2023",
  volume="6",
  number="3",
  pages="15",
  doi="10.1088/2515-7639/acce6f",
  issn="2515-7639",
  url="https://iopscience.iop.org/article/10.1088/2515-7639/acce6f"
}