Room temperature ferromagnetism in epitaxial In2O3 films with embedded nano-sized Fe3O4 columns

Qiang Li; Lin Wei; Yanru Xie; Tie Zhou; Guoxiang Hu; Shishen Yan; Jun Jiao; Yanxue Chen; Guolei Liu; Liangmo Mei

doi:10.1039/C3NR34188G

Room temperature ferromagnetism in epitaxial In₂O₃ films with embedded nano-sized Fe₃O₄ columns†

Qiang Li,^a Lin Wei,^b Yanru Xie,^a Tie Zhou,^a Guoxiang Hu,^a Shishen Yan,^a Jun Jiao,^c Yanxue Chen,*^a Guolei Liu^a and Liangmo Mei^a

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^a School of Physics and State Key Laboratory of Crystal Materials, Shandong University, Jinan, P. R. China
E-mail: cyx@sdu.edu.cn
Fax: +86 531 88362812
Tel: +86 531 88362812

^b School of Information Science and Engineering, Shandong University, Jinan, P. R. China

^c Department of Mechanical & Materials Engineering, Department of Physics, Portland State University, Post Office Box 751, Portland, Oregon 97207-0751, USA

Abstract

Epitaxial In₂O₃ films with embedded Fe₃O₄ oriented nanocolumns were deposited by pulsed laser deposition (PLD) on Y-stabilized ZrO₂ (111) substrates. The resulting films show ferromagnetism at room temperature with strong magnetic anisotropy, which can be attributed to the presence of Fe₃O₄ nanocolumns. Magnetotransport measurements demonstrate a transition from negative magnetoresistance to positive magnetoresistance as the measuring temperature increases. Quantitative coincidence between the anomalous Hall resistivity as a function of the magnetic field and the magnetic hysteresis loop is observed at room temperature, indicating the spin polarization nature of carriers.

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Room temperature ferromagnetism in epitaxial In₂O₃ films with embedded nano-sized Fe₃O₄ columns†

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Room temperature ferromagnetism in epitaxial In₂O₃ films with embedded nano-sized Fe₃O₄ columns

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