Low temperature magnetic properties of amorphous Sm-Fe and Sm-Co thin films
Journal Article
·
· Chin. Phys.; (United States)
OSTI ID:5925083
The low temperature magnetic properties of amorphous Sm-Fe and Sm-Co thin films are investigated. It is found that there exists a distribution of the orientation of the Fe atomic moment in the Sm-Fe films, and the compositional dependence of the effective magnetic moments of the Co atoms in the Sm-Co films is very similar to that of the amorphous Nd-Co films. The magnetic structures of these two alloy systems are determined: There are asperomagnetic structures for the Sm-Fe thin films and collinear ferromagnetic structure for the Sm-Co thin films. The magnetic moment of Sm atoms is very close to zero. The temperature and compositional dependences of coercive force for these two amorphous alloy systems are measured. The H/sub c/ of Sm-Fe films is much larger than that of Sm-Co films, For the Sm-Fe amorphous films, H/sub c/ increases very quickly with an increase of the constants of samarium, and severely drops with increasing temperature in the very low temperature region. However, for the Sm-Co amorphous films, H/sub c/ reaches a maximum at about 43 at % Sm, and decreases with increasing temperature in the exponential form. It is also found that the temperature dependence of magnetization in the low temperature region may be caused by Bloch spin wave excitation and Stoner electronic excitation simultaneously.
- Research Organization:
- Department of Physics, Peking University
- OSTI ID:
- 5925083
- Journal Information:
- Chin. Phys.; (United States), Journal Name: Chin. Phys.; (United States) Vol. 7:4; ISSN CHPHD
- Country of Publication:
- United States
- Language:
- English
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