| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-731 - C8-732 | |
| DOI | https://doi.org/10.1051/jphyscol:19888332 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-731-C8-732
DOI: 10.1051/jphyscol:19888332
1 Department of Applied Physics, Fukui University, Fukui 910, Japan
2 Institute for Solid State Physics, University of Tokyo, Roppongi, Tokyo 106, Japan
3 Institute for Materials Research, Tohoku University, Sendai 980, Japan
J. Phys. Colloques 49 (1988) C8-731-C8-732
DOI: 10.1051/jphyscol:19888332
VALENCE CHANGE IN Yb INTERMETALLICS INDUCED BY TEMPERATURE AND MAGNETIC FIELD
K. Yoshimura1, T. Nitta1, M. Mekata1, T. Shimizu2, T. Sakakibara2, T. Goto2 et G. Kido31 Department of Applied Physics, Fukui University, Fukui 910, Japan
2 Institute for Solid State Physics, University of Tokyo, Roppongi, Tokyo 106, Japan
3 Institute for Materials Research, Tohoku University, Sendai 980, Japan
Abstract
An anomalous field-induced valence transition has been observed at 4.2 K by magnetization (M), volume magnetostriction (ƊV/V) and magnetoresistivity (ρ) measurements of (Yb - In) Cu2. The valence change at the transition is estimated to 0.06 from the volume shrinkage. In (Yb - Ag) Cu2, field dependences of M and ρ consistent with theoretical predictions for Kondo lattices based on the level-crossing between the low-lying levels split by a cubic crystal field have been observed together with a gradual negative ƊV/V.