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Authors: Richter, Nils
Weber, Daniel
Martin, Franziska
Singh, Nirpendra
Schwingenschlögl, Udo
Lotsch, Bettina V.
Kläui, Mathias
Title: Temperature-dependent magnetic anisotropy in the layered magnetic semiconductors CrI3 and CrBr3
Online publication date: 26-Aug-2019
Language: english
Abstract: Chromium trihalides are layered and exfoliable semiconductors and exhibit unusual magnetic properties with a surprising temperature dependence of the magnetization. By analyzing the evolution of the magnetocrystalline anisotropy with temperature in chromium iodide CrI3, we find it strongly changes from K-u = 300 +/- 50 kJ/m(3) at 5 K to Ku = 43 +/- 7 kJ/m(3) at 60 K, close to the Curie temperature. We draw a direct comparison to CrBr3, which serves as a reference, and where we find results consistent with literature. In particular, we show that the anisotropy change in the iodide compound is more than 3 times larger than in the bromide. We analyze this temperature dependence using a classical model, showing that the anisotropy constant scales with the magnetization at any given temperature below the Curie temperature, indicating that the temperature dependence can be explained by a dominant uniaxial anisotropy where this scaling results from local spin clusters having thermally induced magnetization directions that deviate from the overall magnetization.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
URN: urn:nbn:de:hebis:77-publ-592110
Version: Accepted version
Publication type: Zeitschriftenaufsatz
License: In Copyright
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Journal: Physical review materials
Pages or article number: 024004-1
Publisher: APS
Publisher place: College Park, Md.
Issue date: 2018
ISSN: 2475-9953
Publisher URL:
Publisher DOI: 10.1103/PhysRevMaterials.2.024004
Appears in collections:JGU-Publikationen

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