Magnetic anisotropy and coercivity of Fe3Se4 nanostructures

Gen Long; Hongwang Zhang; Da Li; Renat Sabirianov; Zhidong Zhang; Hao Zeng

doi:10.1063/1.3662388

Magnetic anisotropy and coercivity of Fe₃Se₄ nanostructures

Gen Long, Hongwang Zhang, Da Li, Renat Sabirianov, Zhidong Zhang, Hao Zeng

Physics

Research output: Contribution to journal › Article

29 Scopus citations

Abstract

The hard magnetic properties of Fe₃Se₄ nanostructures were studied both experimentally and theoretically. Magnetic measurements showed that Fe₃Se₄ nanoparticles can exhibit giant coercivity exceeding 40 kOe at low temperature (10 K). This unusually large coercivity is attributed to the uniaxial magnetocrystalline anisotropy of the monoclinic structure of Fe₃Se₄ with ordered cation vacancies. The measured anisotropy constant is 1.0 10⁷erg/cm ³, consistent with the result from first-principles calculations. The magnetization reversal mechanism of the nanoparticles is found to be incoherent spin rotation.

Original language	English (US)
Article number	202103
Journal	Applied Physics Letters
Volume	99
Issue number	20
DOIs	https://doi.org/10.1063/1.3662388
State	Published - Nov 14 2011

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3662388

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Long, G., Zhang, H., Li, D., Sabirianov, R., Zhang, Z., & Zeng, H. (2011). Magnetic anisotropy and coercivity of Fe₃Se₄ nanostructures. Applied Physics Letters, 99(20), [202103]. https://doi.org/10.1063/1.3662388

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abstract = "The hard magnetic properties of Fe3Se4 nanostructures were studied both experimentally and theoretically. Magnetic measurements showed that Fe3Se4 nanoparticles can exhibit giant coercivity exceeding 40 kOe at low temperature (10 K). This unusually large coercivity is attributed to the uniaxial magnetocrystalline anisotropy of the monoclinic structure of Fe3Se4 with ordered cation vacancies. The measured anisotropy constant is 1.0 107erg/cm 3, consistent with the result from first-principles calculations. The magnetization reversal mechanism of the nanoparticles is found to be incoherent spin rotation.",

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AB - The hard magnetic properties of Fe3Se4 nanostructures were studied both experimentally and theoretically. Magnetic measurements showed that Fe3Se4 nanoparticles can exhibit giant coercivity exceeding 40 kOe at low temperature (10 K). This unusually large coercivity is attributed to the uniaxial magnetocrystalline anisotropy of the monoclinic structure of Fe3Se4 with ordered cation vacancies. The measured anisotropy constant is 1.0 107erg/cm 3, consistent with the result from first-principles calculations. The magnetization reversal mechanism of the nanoparticles is found to be incoherent spin rotation.

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