TY - JOUR
T1 - Room temperature ferromagnetism of amorphous MgO films prepared by pulsed laser deposition
AU - Li, Jing
AU - Jiang, Yinzhu
AU - Bai, Guohua
AU - Ma, Tianyu
AU - Yang, Deren
AU - Du, Youwei
AU - Yan, Mi
PY - 2014/6
Y1 - 2014/6
N2 - Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (M s) initially increases with the oxygen pressure, the maximum M s of 8.57 emu/cm3 is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the M s significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.
AB - Amorphous MgO thin films were prepared by pulsed laser deposition (PLD) under various oxygen pressures. The structural, magnetic, and optical properties of the films were investigated. All as-deposited samples exhibit room temperature ferromagnetism, which depend strongly on oxygen pressure. It is found that the saturation magnetization (M s) initially increases with the oxygen pressure, the maximum M s of 8.57 emu/cm3 is obtained for the MgO film deposited under an oxygen pressure of 2 mTorr. However, the M s significantly reduces at higher oxygen pressures. Further X-ray photoelectron spectroscopy and photoluminescence demonstrate that the long-range magnetic order in amorphous MgO films can be attributed to the nonstoichiometry effect and the presence of Mg vacancies.
UR - https://www.scopus.com/pages/publications/84901596252
U2 - 10.1007/s00339-013-7922-x
DO - 10.1007/s00339-013-7922-x
M3 - 文章
AN - SCOPUS:84901596252
SN - 0947-8396
VL - 115
SP - 997
EP - 1001
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 3
ER -