Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 1992, Vol. 3 ›› Issue (2): 103

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INFLUENCE OF CHEMICAL ADSORPTION ON THE EFFECTIVE ANISOTROPY CONSTANT OF α —Fe2O3 FINE PARTICLES

Wang Guihua (王桂华)1, Qiao Wenhua (乔文华)2,Li Shi (李 士)3, Dai Zhenghua (戴正华)4, Luo Helie (罗河烈)1   

  1. 1 Institute of Physics, Academia Sinica, Bei?ng 100080, China;
    2 Baotou Normal College, Baotou 014030, China;
    3 Institute of High Energy Physics, Academia Sinica, Beijing 100080, China;
    4 Shanzi Normal College, Shanxi 710062, China
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Wang Guihua (王桂华), Qiao Wenhua (乔文华), Li Shi (李 士), Dai Zhenghua (戴正华), Luo Helie (罗河烈). INFLUENCE OF CHEMICAL ADSORPTION ON THE EFFECTIVE ANISOTROPY CONSTANT OF α —Fe2O3 FINE PARTICLES.Nuclear Science and Techniques, 1992, 3(2): 103

Abstract: The properties of  α  -Fe2O3 fine particles with and without adsorbed pyridine were studied by Mössbauer spectra. The effective anisotropy constant K were calculated. The K of pyridine- adsorbed α -Fe2O3 particles is smaller than that of pure α -Fe2O3 particles. A probable mechanism of the decreasing effective anisotropy constant K is discussed.

Key words: α -Fe2O3, M?ssbauer spectroscopy, Effective anisotropy constant