Publication detail

Evolution of strain across the magnetostructural phase transition in epitaxial FeRh films on different substrates

ARREGI URIBEETXEBARRIA, J. CAHA, O. UHLÍŘ, V.

Original Title

Evolution of strain across the magnetostructural phase transition in epitaxial FeRh films on different substrates

English Title

Evolution of strain across the magnetostructural phase transition in epitaxial FeRh films on different substrates

Type

journal article in Web of Science

Language

en

Original Abstract

We present a detailed x-ray diffraction study of the structural evolution of epitaxial FeRh films across the temperature-driven phase transition between antiferromagnetic and ferromagnetic order. FeRh films grown onto MgO, W/MgO, and Al2O3 substrates show qualitatively different lattice distortions (tetragonal vs rhombohedral), while keeping a sharp transition above room temperature. Temperature-dependent x-ray reciprocal space mapping reveals the phase-specific crystal structure, giving access to both in-plane and out-of-plane lattice parameters and crystalline coherence lengths across different stages of the phase transition. Diffuse x-ray scattering from relaxed films is treated via a mosaic block model, which provides a robust data fitting scheme. It is found that the ferromagnetic phase fraction can stand a larger amount of strain before completely annihilating and transitioning to the antiferromagnetic phase upon cooling, as compared to heating. This is related to the distinct magnetic exchange correlations in the antiferromagnetic and ferromagnetic parent phases.

English abstract

We present a detailed x-ray diffraction study of the structural evolution of epitaxial FeRh films across the temperature-driven phase transition between antiferromagnetic and ferromagnetic order. FeRh films grown onto MgO, W/MgO, and Al2O3 substrates show qualitatively different lattice distortions (tetragonal vs rhombohedral), while keeping a sharp transition above room temperature. Temperature-dependent x-ray reciprocal space mapping reveals the phase-specific crystal structure, giving access to both in-plane and out-of-plane lattice parameters and crystalline coherence lengths across different stages of the phase transition. Diffuse x-ray scattering from relaxed films is treated via a mosaic block model, which provides a robust data fitting scheme. It is found that the ferromagnetic phase fraction can stand a larger amount of strain before completely annihilating and transitioning to the antiferromagnetic phase upon cooling, as compared to heating. This is related to the distinct magnetic exchange correlations in the antiferromagnetic and ferromagnetic parent phases.

Keywords

EXCHANGE SPRING FILMS; FERROMAGNETIC TRANSITION; ALLOYS; FIELD

Released

08.05.2020

Publisher

AMER PHYSICAL SOC

Location

COLLEGE PK

Pages from

174413-1

Pages to

174413-14

Pages count

14

URL

BibTex


@article{BUT164507,
  author="Jon Ander {Arregi Uribeetxebarria} and Ondřej {Caha} and Vojtěch {Uhlíř}",
  title="Evolution of strain across the magnetostructural phase transition in epitaxial FeRh films on different substrates",
  annote="We present a detailed x-ray diffraction study of the structural evolution of epitaxial FeRh films across the temperature-driven phase transition between antiferromagnetic and ferromagnetic order. FeRh films grown onto MgO, W/MgO, and Al2O3 substrates show qualitatively different lattice distortions (tetragonal vs rhombohedral), while keeping a sharp transition above room temperature. Temperature-dependent x-ray reciprocal space mapping reveals the phase-specific crystal structure, giving access to both in-plane and out-of-plane lattice parameters and crystalline coherence lengths across different stages of the phase transition. Diffuse x-ray scattering from relaxed films is treated via a mosaic block model, which provides a robust data fitting scheme. It is found that the ferromagnetic phase fraction can stand a larger amount of strain before completely annihilating and transitioning to the antiferromagnetic phase upon cooling, as compared to heating. This is related to the distinct magnetic exchange correlations in the antiferromagnetic and ferromagnetic parent phases.",
  address="AMER PHYSICAL SOC",
  chapter="164507",
  doi="10.1103/PhysRevB.101.174413",
  howpublished="online",
  institution="AMER PHYSICAL SOC",
  number="17",
  volume="101",
  year="2020",
  month="may",
  pages="174413-1--174413-14",
  publisher="AMER PHYSICAL SOC",
  type="journal article in Web of Science"
}