Temperature dependence of the /sup 57/Fe hyperfine magnetic field distribution in Fe-Ni
Conference
·
OSTI ID:6449261
The temperature dependence of the /sup 57/Fe hyperfine magnetic field (hmf) in Fe-Ni is stronger than the temperature dependence of the /sup 57/Fe hmf in pure Fe. By analyzing the shape of the /sup 57/Fe hmf distribution, and with the help of experiments with Si in Fe-Ni, we deduce that this anomalous temperature dependence originates from a large thermal sensitivity of the magnetic moments at those Fe atoms with more Ni nearest neighbors. A strong temperature dependence of the recoil-free fraction was also observed in Fe-Ni alloys. We suggest that a large mean square thermal displacement of Fe atoms in Fe-Ni is the cause of the anomalous temperature dependence.
- Research Organization:
- Lawrence Berkeley Lab., CA (USA); California Univ., Berkeley (USA). Dept. of Materials Science and Mineral Engineering
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 6449261
- Report Number(s):
- LBL-19380; CONF-8509193-2; ON: DE86005229
- Country of Publication:
- United States
- Language:
- English
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