The role of oxygen vacancies in magnetism of CoxTi1−xO2−δ films on Si(001) prepared by sol–gel method
Тип публикации: Journal Article
Дата публикации: 2006-08-01
scimago Q2
wos Q3
БС2
SJR: 0.446
CiteScore: 4.3
Impact factor: 2.4
ISSN: 00381098, 18792766
Materials Chemistry
General Chemistry
Condensed Matter Physics
Краткое описание
CoxTi1−xO2−δ films have been prepared on Si(001) substrates by sol–gel method. When heat treated in air, CoxTi1−xO2−δ films are non-ferromagnetic at room temperature. However, after further vacuum annealing or hydrogenation, CoxTi1−xO2−δ films show room-temperature ferromagnetism (RTFM). When the vacuum annealed CoxTi1−xO2−δ films are reheated in air, the magnetic moments of the films strongly reduce. After these films are vacuum annealed once again, the magnetic moments are greatly enhanced, confirming the role of vacuum annealing in ferromagnetism of CoxTi1−xO2−δ films. The x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS) and measurements of magnetization ( M ) vs temperature ( T ) fail to detect Co clusters in the vacuum annealed and the hydrogenated CoxTi1−xO2−δ films. Oxygen vacancies are formed in CoxTi1−xO2−δ films after vacuum annealing and hydrogenation, determined by XRD and XPS measurements. These results indicate that oxygen vacancies created by vacuum annealing and hydrogenation play an important role in the generation of RTFM in CoxTi1−xO2−δ films.
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Liu L. F. et al. The role of oxygen vacancies in magnetism of CoxTi1−xO2−δ films on Si(001) prepared by sol–gel method // Solid State Communications. 2006. Vol. 139. No. 6. pp. 263-267.
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Liu L. F., Kang J. F., Wang Yu., Tang H., Kong L., Zhang X., Han R. Q. The role of oxygen vacancies in magnetism of CoxTi1−xO2−δ films on Si(001) prepared by sol–gel method // Solid State Communications. 2006. Vol. 139. No. 6. pp. 263-267.
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TY - JOUR
DO - 10.1016/j.ssc.2006.06.022
UR - https://doi.org/10.1016/j.ssc.2006.06.022
TI - The role of oxygen vacancies in magnetism of CoxTi1−xO2−δ films on Si(001) prepared by sol–gel method
T2 - Solid State Communications
AU - Liu, L. F.
AU - Kang, J. F.
AU - Wang, Yu
AU - Tang, H.
AU - Kong, Lingjiang
AU - Zhang, X.
AU - Han, R. Q.
PY - 2006
DA - 2006/08/01
PB - Elsevier
SP - 263-267
IS - 6
VL - 139
SN - 0038-1098
SN - 1879-2766
ER -
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@article{2006_Liu,
author = {L. F. Liu and J. F. Kang and Yu Wang and H. Tang and Lingjiang Kong and X. Zhang and R. Q. Han},
title = {The role of oxygen vacancies in magnetism of CoxTi1−xO2−δ films on Si(001) prepared by sol–gel method},
journal = {Solid State Communications},
year = {2006},
volume = {139},
publisher = {Elsevier},
month = {aug},
url = {https://doi.org/10.1016/j.ssc.2006.06.022},
number = {6},
pages = {263--267},
doi = {10.1016/j.ssc.2006.06.022}
}
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Liu, L. F., et al. “The role of oxygen vacancies in magnetism of CoxTi1−xO2−δ films on Si(001) prepared by sol–gel method.” Solid State Communications, vol. 139, no. 6, Aug. 2006, pp. 263-267. https://doi.org/10.1016/j.ssc.2006.06.022.