Distinctive uniaxial magnetic anisotropy and positive magnetoresistance in (110)-oriented Fe3O4 films

Joonghoe Dho; Byeong Geon Kim; Sanghoon Ki

doi:10.1063/1.4918915

Distinctive uniaxial magnetic anisotropy and positive magnetoresistance in (110)-oriented Fe₃O₄ films

Joonghoe Dho, Byeong Geon Kim, Sanghoon Ki

Department of Physics

Kyungpook National University

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

Magnetite (Fe₃O₄) films were synthesized on (110)-oriented MgO, MgAl₂O₄, and SrTiO₃ substrates for comparative studies of the substrates' effects on magnetic and magnetoresistance properties of the films. For the [-110] direction, the hysteresis loops of the Fe₃O₄ film on MgAl₂O₄ exhibited a good squareness with the largest coercivity of ∼1090 Oe, and the ratio of remanent magnetization to saturation magnetization was ∼0.995. For the [001] direction, positive magnetoresistance in weak magnetic fields was most distinct for the (110) SrTiO₃ substrate with the largest lattice mismatch. Positive magnetoresistance in the (110) Fe₃O₄ films was presumably affected by imperfect atomic arrangements at anti-phase boundaries.

Original language	English
Article number	163904
Journal	Journal of Applied Physics
Volume	117
Issue number	16
DOIs	https://doi.org/10.1063/1.4918915
State	Published - 28 Apr 2015

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title = "Distinctive uniaxial magnetic anisotropy and positive magnetoresistance in (110)-oriented Fe3O4 films",

abstract = "Magnetite (Fe3O4) films were synthesized on (110)-oriented MgO, MgAl2O4, and SrTiO3 substrates for comparative studies of the substrates' effects on magnetic and magnetoresistance properties of the films. For the [-110] direction, the hysteresis loops of the Fe3O4 film on MgAl2O4 exhibited a good squareness with the largest coercivity of ∼1090 Oe, and the ratio of remanent magnetization to saturation magnetization was ∼0.995. For the [001] direction, positive magnetoresistance in weak magnetic fields was most distinct for the (110) SrTiO3 substrate with the largest lattice mismatch. Positive magnetoresistance in the (110) Fe3O4 films was presumably affected by imperfect atomic arrangements at anti-phase boundaries.",

author = "Joonghoe Dho and Kim, {Byeong Geon} and Sanghoon Ki",

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T1 - Distinctive uniaxial magnetic anisotropy and positive magnetoresistance in (110)-oriented Fe3O4 films

AU - Dho, Joonghoe

AU - Kim, Byeong Geon

AU - Ki, Sanghoon

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Y1 - 2015/4/28

N2 - Magnetite (Fe3O4) films were synthesized on (110)-oriented MgO, MgAl2O4, and SrTiO3 substrates for comparative studies of the substrates' effects on magnetic and magnetoresistance properties of the films. For the [-110] direction, the hysteresis loops of the Fe3O4 film on MgAl2O4 exhibited a good squareness with the largest coercivity of ∼1090 Oe, and the ratio of remanent magnetization to saturation magnetization was ∼0.995. For the [001] direction, positive magnetoresistance in weak magnetic fields was most distinct for the (110) SrTiO3 substrate with the largest lattice mismatch. Positive magnetoresistance in the (110) Fe3O4 films was presumably affected by imperfect atomic arrangements at anti-phase boundaries.

AB - Magnetite (Fe3O4) films were synthesized on (110)-oriented MgO, MgAl2O4, and SrTiO3 substrates for comparative studies of the substrates' effects on magnetic and magnetoresistance properties of the films. For the [-110] direction, the hysteresis loops of the Fe3O4 film on MgAl2O4 exhibited a good squareness with the largest coercivity of ∼1090 Oe, and the ratio of remanent magnetization to saturation magnetization was ∼0.995. For the [001] direction, positive magnetoresistance in weak magnetic fields was most distinct for the (110) SrTiO3 substrate with the largest lattice mismatch. Positive magnetoresistance in the (110) Fe3O4 films was presumably affected by imperfect atomic arrangements at anti-phase boundaries.

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Distinctive uniaxial magnetic anisotropy and positive magnetoresistance in (110)-oriented Fe₃O₄ films

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