Temperature dependence of magnetic anisotropy constant in iron chalcogenide Fe3Se4: Excellent agreement with theories

Jun Wang, Hongyan Duan, Xiong Lin, Victor Aguilar, Aaron Mosqueda, Guo-meng Zhao

doi:10.1063/1.4759352

Temperature dependence of magnetic anisotropy constant in iron chalcogenide Fe3Se4: Excellent agreement with theories

DOI PDF 被引用文献4件

Jun Wang

Ningbo University 1 Department of Physics, Faculty of Science, , Ningbo, People's Republic of China
Hongyan Duan

Ningbo University 1 Department of Physics, Faculty of Science, , Ningbo, People's Republic of China
Xiong Lin

Ningbo University 1 Department of Physics, Faculty of Science, , Ningbo, People's Republic of China
Victor Aguilar

California State University 2 Department of Physics and Astronomy, , Los Angeles, California 90032, USA
Aaron Mosqueda

California State University 2 Department of Physics and Astronomy, , Los Angeles, California 90032, USA
Guo-meng Zhao

Ningbo University 1 Department of Physics, Faculty of Science, , Ningbo, People's Republic of China

書誌事項

公開日: 2012-11-15

DOI

10.1063/1.4759352

公開者: AIP Publishing

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説明

<jats:p>Magnetic hysteresis loops were measured for ferrimagnetic iron chalcogenide Fe3Se4 nanoparticles in the whole temperature range below the Curie temperature TC (315 K). The coercivity of the material is huge, reaching about 40 kOe at 10 K. The magnetic anisotropy constant K was determined from the magnetic hysteresis loop using the law of approach to saturation. The deduced anisotropy constant at 10 K is 5.22×106 erg/cm3, which is over one order of magnitude larger than that of Fe3O4. We also demonstrated that the experimental magnetic hysteresis loop is in good agreement with the theoretical curve calculated by Stoner and Wohlfarth for a noninteracting randomly oriented uniaxial single-domain particle system. Moreover, we show that K is proportional to the cube of the saturation magnetization Ms, which confirms earlier theoretical models for uniaxial magnets.</jats:p>