TY - JOUR
T1 - Voltage-induced coercivity change in FePt/MgO stacks with different FePt thicknesses
AU - Kikuchi, Yusuke
AU - Seki, Takeshi
AU - Kohda, Makoto
AU - Nitta, Junsaku
AU - Takanashi, Koki
PY - 2013/7/17
Y1 - 2013/7/17
N2 - We studied magnetic properties by applying electric voltage (V app) to FePt/MgO stacks with different FePt thicknesses (t FePt), where tFePt was varied in the range from 0.6 to 1.5 nm. The change in coercivity (Hc) became remarkable when t FePt was reduced, and a change in Hc of 45 Oe was achieved for tFePt = 0.6 nm by changing Vapp in the range from +5 to -13 V. However, the resistance change of the anomalous Hall effect remained almost constant regardless of Vapp. These experimental results suggest the possibility of interface magnetic anisotropy between FePt and MgO being modulated in the present devices by applying Vapp, which leads to voltage-induced change in Hc in the FePt layer.
AB - We studied magnetic properties by applying electric voltage (V app) to FePt/MgO stacks with different FePt thicknesses (t FePt), where tFePt was varied in the range from 0.6 to 1.5 nm. The change in coercivity (Hc) became remarkable when t FePt was reduced, and a change in Hc of 45 Oe was achieved for tFePt = 0.6 nm by changing Vapp in the range from +5 to -13 V. However, the resistance change of the anomalous Hall effect remained almost constant regardless of Vapp. These experimental results suggest the possibility of interface magnetic anisotropy between FePt and MgO being modulated in the present devices by applying Vapp, which leads to voltage-induced change in Hc in the FePt layer.
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U2 - 10.1088/0022-3727/46/28/285002
DO - 10.1088/0022-3727/46/28/285002
M3 - Article
AN - SCOPUS:84879893717
VL - 46
JO - Journal Physics D: Applied Physics
JF - Journal Physics D: Applied Physics
SN - 0022-3727
IS - 28
M1 - 285002
ER -