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【期刊论文】Oxygen vacancy enhanced the room temperature ferromagnetism in Ni-doped TiO2 thin films
侯登录, D.L. Hou, H.J. Meng, L.Y. Jia, X.J. Ye, H.J. Zhou, X.L. Li
Physics Letters A 364 (2007) 318-322,-0001,():
-1年11月30日
Ni-doped TiO2 anatase thin films were fabricated by reactive magnetron sputtering on SiO2 substrates. The doping and annealing effects on structure and magnetism for the films have been systematically investigated. The results show that ferromagnetism originated from the doped matrix and enhancement (suppression) of ferromagnetism is strongly correlated with the increase (decrease) of oxygen vacancies in TiO2.
Diluted magnetic semiconductors, Room-temperature ferromagnetism, Oxygen vacancy, Magnetic domains
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【期刊论文】Magnetic properties of n-type Cu-doped ZnO thin films
侯登录, D. L. Hou, X. J. Ye, H. J. Meng, H. J. Zhou, X. L. Li, C. M. Zhen, G. D. Tang
APPLIED PHYSICS LETTERS 90, 142502 (2007),-0001,():
-1年11月30日
A series of n-type Zn1-xCuxO (x = 0.02, 0.06, 0.10, and 0.12) films was prepared using direct current reactive magnetron sputtering. Magnetic measurements indicate that all the films are ferromagnetic at room temperature and the moment per Cu ion decreases with increasing copper concentration and nitrogen doping. The observed magnetic moment was 1.8
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【期刊论文】Preisach studies on ZFC/FC magnetization behavior of sintered SrRuO3
侯登录, D.L. Hou, , E.Y. Jiang, Z.Q. Li, P. Wu, H.L. Bai, G.D. Tang, X.F. Nie
Journal of Magnetism and Magnetic Materials 256 (2003) 279-285,-0001,():
-1年11月30日
Zero-field-cooled (ZFC) magnetization, field-cooled (FC) magnetization, AC magnetic susceptibility and major hysteresis loops of sintered SrRuO3 have been measured over the range of magnetic ordering temperature. The data were analyzed within the framework of the Preisach model. The numerical simulations match the major features of ZFC/FC magnetization. The results indicate that various ZFC/FC behaviors originate from the applied field and the Barkhausen spectrum of the sample.
Zero-field-cooled (, ZFC), magnetization, Field-cooled (, FC), magnetization, Preisach model, Barkhausen instability, Ferromagnet
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【期刊论文】Preisach modeling on the magnetic properties of Sr1–xCaxRuO3
侯登录, Deng-Lu Hou, Jing Xu, Yun Bai, Jing Zhao, Guo-Qiang Du, Gui-De Tang, Xiang-Fu Nie
phys. Stat. sol. (b) 241, No. 8, 1928-1934 (2004),-0001,():
-1年11月30日
The samples Sr1–xCaxRuO3 (x = 0.0, 0.2, 0.6) have been synthesized by a solid state reaction, and characterized by the zero field cooled (ZFC), field cooled (FC) magnetic moments and the major hysteresis loops. The data have been analyzed within the framework of a generalized Preisach model, which includes thermal fluctuations, critical phenomenon, and temperature dependent distribution of free energy barriers. The model provides an excellent description of the experimental data, and the simulating results are in good agreement with the experiment results. All the ZFC/FC curves at different applied fields and all the major hysteresis loops at different temperatures can be replicated by the model with one set of parameters.
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【期刊论文】Preisach Modelling on the Magnetic Properties of Nano-Particle Fe3O4
侯登录, HOU Deng-Lul, ZHAO Jing, XU Jing, DU Zi-Xia, TANG Gui-De
CHIN. PHYS. LETT. Vol. 22, No. 4 (2005),-0001,():
-1年11月30日
A sample of nano-particle Fe3O4 was synthesized using coprecipitation, and characterized by zero field cooling (ZFC) and field cooling (FC) magnetic moments and the major hysteresis loops. The data are analysed within the framework of a generalized Preisach model, which provides an excellent description of the experimental data. The simulated results are in good agreement with the experimental data. Using the model, we obtain that the blocking temperature of Fe3O4 nano-particles with diameter of 8.4nm is 105K, and the interaction field distribution between the particles is 550Oe.
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