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Submitted on 1 Jan 1974
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MÖSSBAUER STUDY OF FERROMAGNETIC METAL SURFACE
T. Shinjo
To cite this version:
T. Shinjo. MÖSSBAUER STUDY OF FERROMAGNETIC METAL SURFACE. Journal de Physique Colloques, 1974, 35 (C6), pp.C6-691-C6-691. �10.1051/jphyscol:19746154�. �jpa-00215770�
JOURNAL DE PHYSIQUE Colloque C6, supplkment au no 12, Tome 35, Dtcembre 1974, page C6-691
M~SSBAUER STUDY OF FERROMAGNETIC METAL SURFACE
T. SHINJO
Institute for Chemical Research, Kyoto University, Uji, Kyoto-fu, Japan
Resume. - Les proprietb magnetiques d'une surface mktallique ferromagnetique ont kt6 Btudiees par spectroscopie Mossbauer d'emission de 57Co. Sur une surface de cobalt (ou de fer) on a depose t5lectrolytiquement d'abord du cobalt nature1 (ou du fer) puis une microquantitk de 57C0 dans les m&mes conditions electrolytes. Le spectre Mossbauer a 4.2 K pour une surface de cobalt a montre que le spectre hyperfin du 57Fe est distribu6 entre 260 kOe et 350 kOe. Dans le cas d'une surface de fer, la distribution est estimCe &tre 240 - 340 kOe (cf. avec la valeur en profondeur de la masse, 340 kOe). Ces resultats montrent que I'effet de surface sur le moment magnktique n'est pas specta- culaire. Cependant la reduction du champ hyperfin sugg6re que le moment magn6tique en surface a diminu6. Les details ont ete publies ailleurs.
Abstract. - Magnetic properties of ferromagnetic metal surface have been studied by COST Mossbauer source measurements. On a surface of cobalt (or iron), natural cobalt (or iron) was electrolytically deposited and subsequently a microquantity of Co57 was deposited under the same electrolytic condition. The Mossbauer spectrum at 4.2 K for a cobalt surface showed that the hyper- fine field of Fe57 has a distribution ranging from 260 kOe to 350 kOe. In the case of iron surface, the distribution was estimated to be 240
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340 kOe (cf. the bulk value, 340 kOe). These results show that surface effect on the magnetic moment is not drastic. However, the reduction of the hyperfine field suggests that the magnetic moment in the surface has shrunk in some degree. Details have been published elsewhere [I, 21.References
[I] SHINJO, T., MATSUZAWA, T., TAKADA, T., NASU, S. and MURAKAMI, Y., J. Phys. Soc. Japan 35 (1973) 1032.
[2] SHINJO, T., MATSUZAWA, T., MIZUTANI, T. and TAKADA, T., Japan. J. Appl. Phys. 13 sup. (1974) to be published.
Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:19746154
