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- W2776389628 abstract "The anisotropic magnetoresistance (AMR) near the Verwey temperature $({T}_{mathrm{V}})$ is investigated in charge ordered ${mathrm{Fe}}_{3}{mathrm{O}}_{4}$ epitaxial films. When the temperature continuously decreases below ${T}_{mathrm{V}}$, the symmetry of AMR in ${mathrm{Fe}}_{3}{mathrm{O}}_{4}$(100) film evolves from twofold to fourfold at a magnetic field of 50 kOe, where the magnetic field is parallel to the film surface, whereas AMR in ${mathrm{Fe}}_{3}{mathrm{O}}_{4}$(111) film maintains twofold symmetry. By analyzing AMR below ${T}_{mathrm{V}}$, it is found that the Verwey transition contains two steps, including a fast charge ordering process and a continuous formation process of trimeron, which is comfirmed by the temperature-dependent Raman spectra. Just below ${T}_{mathrm{V}}$, the twofold AMR in ${mathrm{Fe}}_{3}{mathrm{O}}_{4}$(100) film originates from uniaxial magnetic anisotropy. The fourfold AMR at a lower temperature can be ascribed to the in-plane trimerons. By comparing the AMR in the films with two orientations, it is found that the trimeron shows a smaller resistivity in a parallel magnetic field. The field-dependent AMR results show that the trimeron-sensitive field has a minimum threshold of about 2 kOe." @default.
- W2776389628 created "2018-01-05" @default.
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- W2776389628 date "2017-12-26" @default.
- W2776389628 modified "2023-10-12" @default.
- W2776389628 title "Anisotropic magnetoresistance across Verwey transition in charge ordered <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Fe</mml:mi><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mi mathvariant=normal>O</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:mrow></mml:math> epitaxial films" @default.
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- W2776389628 doi "https://doi.org/10.1103/physrevb.96.214434" @default.
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