TY - JOUR
T1 - Control of ferromagnetism at room temperature in (Ti,Co)O 2- δ via chemical doping of electron carriers
AU - Yamada, Y.
AU - Fukumura, T.
AU - Ueno, K.
AU - Kawasaki, M.
N1 - Funding Information:
We gratefully acknowledge Y. Tokura, J. Fujioka, and Y. Kozuka for the use of the magnetometer. This research was in part supported by JSPS through the “Funding Program for Next Generation World-Leading Researchers (NEXT Program)” initiated by CSTP (GR029) and Grants-in-Aid for Scientific Research on Priority Areas (21019004) of MEXT.
PY - 2011/12/12
Y1 - 2011/12/12
N2 - Ferromagnetism at room temperature in (Ti,Co)O 2 - δ was controlled by changing its electron density via chemical doping, where the oxygen vacancy δ served as an electron donor. With increasing the electron density, the ferromagnetic anomalous Hall effect and magnetization emerged from a paramagnetic state, while undergoing an insulator to metal transition. This result supports that the electron carriers mediated the ferromagnetic exchange interaction and is consistent with the electric field effect study on the ferromagnetism recently reported [Y. Yamada, K. Ueno, T. Fukumura, H. T. Yuan, H. Shimotani, Y. Iwasa, L. Gu, S. Tsukimoto, Y. Ikuhara, and M. Kawasaki, Science 332, 1065 (2011)].
AB - Ferromagnetism at room temperature in (Ti,Co)O 2 - δ was controlled by changing its electron density via chemical doping, where the oxygen vacancy δ served as an electron donor. With increasing the electron density, the ferromagnetic anomalous Hall effect and magnetization emerged from a paramagnetic state, while undergoing an insulator to metal transition. This result supports that the electron carriers mediated the ferromagnetic exchange interaction and is consistent with the electric field effect study on the ferromagnetism recently reported [Y. Yamada, K. Ueno, T. Fukumura, H. T. Yuan, H. Shimotani, Y. Iwasa, L. Gu, S. Tsukimoto, Y. Ikuhara, and M. Kawasaki, Science 332, 1065 (2011)].
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U2 - 10.1063/1.3669505
DO - 10.1063/1.3669505
M3 - Article
AN - SCOPUS:83755184016
SN - 0003-6951
VL - 99
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 24
M1 - 242502
ER -