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Lightcurve survey of V-type asteroids in the inner asteroid belt
Hasegawa, S.,Miyasaka, S.,Mito, H.,Sarugaku, Y.,Ozawa, T.,Kuroda, D.,Nishihara, S.,Harada, A.,Yoshida, M.,Yanagisawa, K.,Shimizu, Y.,Nagayama, S.,Toda, H.,Okita, K.,Kawai, N.,Mori, M.,Sekiguchi, T.,Is Astronomical Society of Japan 2014 Publications of the Astronomical Society of Japan Vol.66 No.3
Magnetic Properties of Fe-doped NiO Nanoparticles
A. Kurokawa,N. Sakai, L. Zhu,H. Takeuchi,S. Yano,T. Yanoh,K. Onuma,T. Kondo,K. Miike,T. Miyasaka,Y. Ichiyanagi 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
Ni1−xFexO (x = 0, 0.05, 0.1) nanoparticles with several nanometers encapsulated with amorphousSiO2 were prepared by our novel preparation method. A NiO single phase structure was confirmedusing the X-ray diffraction measurements. It is considered that Ni ions are replaced by Fe ionsbecause it is observed that the lattice constant decreases. The temperature dependence behaviorof the magnetization revealed that the blocking temperature, TB, shifted from 17 to 57 K as theamount of Fe ions increased, and that below TB, ferromagnetic behaviors were exhibited. Thecoercive force, HC, increased from 0.8 to 1.5 kOe as the amount of Fe ions increased.