The anomalous Hall effect in the epitaxial-grown semiconducting CuCo2O4 thin film
Source abstract
Abstract
The high-quality inverse spinel CuCo2O4 thin films are epitaxially grown on (001) MgAl2O4 substrates by radio frequency magnetron sputtering. The electrical transport properties exhibit typical semiconducting characteristics, accompanying the enhancement of resistivity with the thinning of CuCo2O4 thickness. The transport properties could be well understood by the Mott variable range hopping model. The anomalous Hall effect with a clear hysteresis loop is observed below 100 K, indicating the existence of out-of-plane magnetization in the epitaxial-grown CuCo2O4 films. In addition, the negative magnetoresistance at low temperature reverses to the positive magnetoresistance (≥100 K), which is related to the changes from the decrease in spin/carrier scattering under the magnetic field at low temperature to the enhancement of carrier deflection due to the conventional Lorenz force (≥100 K). The observed physical properties are closely related to the orbital occupation of Cu ion in CuCo2O4 films, which is a significant difference compared to that of documented metallic NiCo2O4. This work is a good comprehensive study of inverse spinel oxide thin films.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · ZnO doping and properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Center of Free Electron Laser and High Magnetic Field, and Leibniz International Joint Research Center of Materials Sciences of Anhui Province, Anhui University 1 , Hefei 230601, China
School of Materials Science and Engineering, Anhui University 2 , Hefei 230601, China
Department of Physics, Beijing Normal University 3 , Beijing 100875, China
Institutes of Physical Science and Information Technology, Anhui University 4 , Hefei 230601, China
School of Physics and Optoelectronic Engineering, Anhui University 5 , Hefei 230601, China
Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences 6 , Hefei 230031, China
Information Materials and Intelligent Sensing Laboratory of Anhui Province, and Anhui Key Laboratory of Magnetic Functional Materials and Devices, Anhui University 7 , Hefei 230601, China
Funding
National Key R&D Program of China · National Natural Science Foundation of China · Scientific Research Foundation of the High Education Institutions for Distinguished Young Scholars in Anhui Province · Innovation Project for Overseas Researcher in Anhui Province
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