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research article

Magnetic structure of a single-crystal thin film of EuCd2Sb2

Heinrich, Eliot
•
Nakamura, Ayano
•
Nishihaya, Shinichi
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July 1, 2024
Physical Review B

We investigate the magnetic order in single crystalline EuCd2Sb2 thin films using a combined theoretical and experimental approach. Resonant elastic x-ray scattering experiments reveal a sharp magnetic peak at q=(0,0,12) below TN=7.2 K, indicative of interlayer antiferromagnetic ordering. Additionally, we observe a weak diffuse magnetic signal centered at q=(0,0,1) that persists above TN, up to TC∼11 K. Our Monte Carlo simulations of a classical spin model approximation of the Eu magnetic sublattice demonstrate that the diffuse signal can arise from ferromagnetic coupling in the top few layers due to surface oxidation. On the other hand, the bulk of the sample exhibits antiferromagnetic coupling between layers. Finally, our fit of the model parameters to the magnetic ordering temperatures shed light on the exchange couplings that are key in stabilizing the observed composite magnetic order.

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Type
research article
DOI
10.1103/PhysRevB.110.024405
Scopus ID

2-s2.0-85198096020

Author(s)
Heinrich, Eliot
•
Nakamura, Ayano
•
Nishihaya, Shinichi
•
Weschke, Eugen
•
Rønnow, Henrik  
•
Uchida, Masaki
•
Flebus, Benedetta
•
Soh, Jian Rui  
Date Issued

2024-07-01

Published in
Physical Review B
Volume

110

Issue

2

Article Number

024405

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LQM  
FunderFunding(s)Grant NumberGrant URL

Agency for Science Technology and Research

Boston College

Singapore National Science Scholarship

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Available on Infoscience
January 24, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/243367
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