Detail publikace

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

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

Originální název

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

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

EXCHANGE SPRING FILMS; FERROMAGNETIC TRANSITION; ALLOYS; FIELD

Autoři

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

Vydáno

8. 5. 2020

Nakladatel

AMER PHYSICAL SOC

Místo

COLLEGE PK

ISSN

2469-9950

Periodikum

PHYSICAL REVIEW B

Ročník

101

Číslo

17

Stát

Spojené státy americké

Strany od

174413-1

Strany do

174413-14

Strany počet

14

URL