Volume 119, Number 5, September 2017
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||15 November 2017|
Abnormal magnetic properties of MnBi thin film synthesized by MBE
State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University - Guangzhou 510275, PRC
Received: 26 August 2017
Accepted: 2 October 2017
MnBi has attracted much attention due to its unusual magnetic properties. It has the potential as an alternative to the permanent magnets containing rare-earth elements. In this paper, the MnBi thin film was grown by plasma-assisted molecular beam epitaxial technique. The as-grown film shows ferromagnetic property and an anomalous magnetization dependence on temperature. The X-ray photoelectron spectrum reveals that there are regular and interstitial sites Mn atoms with two bonding states. The observed decrease of magnetization at ∼230 K would be ascribed to the movements of Mn atoms to the interstitial sites leaving behind Mn vacancies. Also at ∼90 K, it exhibits a spin reorientation due to the magnetization change from c-axis to ab-plane which is related to the abnormal temperature dependence of the lattice parameters.
PACS: 75.47.Np – Metals and alloys / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 71.55.Ak – Metals, semimetals, and alloys
© EPLA, 2017
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