TY - JOUR
T1 - Substrate effects on in-plane magnetic anisotropy and verwey transition temperatures of (100) magnetite (Fe3O4) films
AU - Dho, Joonghoe
AU - Kim, Byeonggeon
AU - Ki, Sanghoon
N1 - Publisher Copyright:
© 1965-2012 IEEE.
PY - 2016/7
Y1 - 2016/7
N2 - (100) Fe3O4 films were grown on five different (100)-oriented substrates: MgO, MgAl2O4 (MAO), (PbMg0.33Nb0.67)1-x:(PbTiO3)x (PMNT), SrTiO3 (STO), and (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT), to investigate the substrate effects on structural, magnetic, and transport properties of the films. The X-ray diffraction measurements suggested that the epitaxial (100) Fe3O4 films were grown, although the lattice mismatch between the Fe3O4 and the substrates varied from +0.25% to -7.8%. Remarkably, the (100) Fe3O4 films grown on MAO, PMNT, and STO substrates exhibited a distinctive in-plane magnetic anisotropy with the magnetic easy axis along the [010] and [001] directions. In contrast, the (100) Fe3O4 films on the MgO and LSAT substrates showed a very weak anisotropy in the [011] easy direction. The Verwey transition temperature of the (100) Fe3O4 film was found to have a minimum value of ∼ 110K for MgO and a maximum value of ∼ 122K for STO. These results suggest that the magnetic anisotropy and Verwey transition behaviors of the (100) Fe3O4 film can be tuned by film growth on a specific substrate.
AB - (100) Fe3O4 films were grown on five different (100)-oriented substrates: MgO, MgAl2O4 (MAO), (PbMg0.33Nb0.67)1-x:(PbTiO3)x (PMNT), SrTiO3 (STO), and (LaAlO3)0.3(Sr2AlTaO6)0.7 (LSAT), to investigate the substrate effects on structural, magnetic, and transport properties of the films. The X-ray diffraction measurements suggested that the epitaxial (100) Fe3O4 films were grown, although the lattice mismatch between the Fe3O4 and the substrates varied from +0.25% to -7.8%. Remarkably, the (100) Fe3O4 films grown on MAO, PMNT, and STO substrates exhibited a distinctive in-plane magnetic anisotropy with the magnetic easy axis along the [010] and [001] directions. In contrast, the (100) Fe3O4 films on the MgO and LSAT substrates showed a very weak anisotropy in the [011] easy direction. The Verwey transition temperature of the (100) Fe3O4 film was found to have a minimum value of ∼ 110K for MgO and a maximum value of ∼ 122K for STO. These results suggest that the magnetic anisotropy and Verwey transition behaviors of the (100) Fe3O4 film can be tuned by film growth on a specific substrate.
UR - http://www.scopus.com/inward/record.url?scp=84977111402&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2016.2521604
DO - 10.1109/TMAG.2016.2521604
M3 - Article
AN - SCOPUS:84977111402
SN - 0018-9464
VL - 52
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 7
M1 - 7390252
ER -