Publication detail

Controlling the Metamagnetic Phase Transition in FeRh/MnRh Superlattices and Thin-Film Fe50-xMnxRh50 Alloys

HORKÝ, M. ARREGI URIBEETXEBARRIA, J. PATEL, S. STAŇO, M. MEDAPALLI, R. CAHA, O. VOJÁČEK, L. HORÁK, M. UHLÍŘ, V. FULLERTON, E.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

Equiatomic and chemically ordered FeRh and MnRh compounds feature a first-order metamagnetic phase transition between antiferromagnetic and ferromagnetic order in the vicinity of room temperature, exhibiting interconnected structural, magnetic, and electronic order parameters. We show that these two alloys can be combined to form hybrid metamagnets in the form of sputter-deposited superlattices and alloys on single-crystalline MgO substrates. Despite being structurally different, the magnetic behavior of the alloys with substantial Mn content resembles that of the FeRh/MnRh superlattices in the ultrathin individual layer limit. For FeRh/MnRh superlattices, dissimilar lattice distortions of the constituent FeRh and MnRh layers at the antiferromagnetic-ferromagnetic transition cause double-step transitions during cooling, while the magnetization during the heating branch shows a smooth, continuous trend. For Fe(50-x)Mn(x)Rh(50 )alloy films, the substitution of Mn at the Fe sites introduces an effective tensile in-plane strain and magnetic frustration in the highly ordered epitaxial films, largely influencing the phase transition temperature T-M (by more than 150 K). In addition, Mn acts as a surfactant, enabling the growth of continuous thin films at higher temperatures. Thus, the introduction of hybrid FeRh-MnRh systems with adjustable parameters provides a pathway for the realization of tunable spintronic devices based on magnetic phase transitions.

Keywords

metamagnetism; magnetic alloys and superlattices; FeRh; MnRh; epitaxy; strain engineering

Authors

HORKÝ, M.; ARREGI URIBEETXEBARRIA, J.; PATEL, S.; STAŇO, M.; MEDAPALLI, R.; CAHA, O.; VOJÁČEK, L.; HORÁK, M.; UHLÍŘ, V.; FULLERTON, E.

Released

6. 2. 2022

Publisher

AMER CHEMICAL SOC

Location

WASHINGTON

ISBN

1944-8252

Periodical

ACS applied materials & interfaces

Year of study

Number

State

United States of America

Pages from

3568

Pages to

3579

Pages count

URL

https://pubs.acs.org/doi/10.1021/acsami.1c22460

BibTex

@article{BUT176681,
  author="Michal {Horký} and Jon Ander {Arregi Uribeetxebarria} and Sheena K. K. {Patel} and Michal {Staňo} and Rajasekhar {Medapalli} and Ondřej {Caha} and Libor {Vojáček} and Michal {Horák} and Vojtěch {Uhlíř} and E.E. {Fullerton}",
  title="Controlling the Metamagnetic Phase Transition in FeRh/MnRh Superlattices and Thin-Film Fe50-xMnxRh50 Alloys",
  journal="ACS applied materials & interfaces",
  year="2022",
  volume="14",
  number="2",
  pages="3568--3579",
  doi="10.1021/acsami.1c22460",
  issn="1944-8252",
  url="https://pubs.acs.org/doi/10.1021/acsami.1c22460"
}