| Autor: |
Ouri Gorochov, D. Ravot, A. Percheron-Guégan, Alain Mauger, S. Merah |
| Rok vydání: |
1995 |
| Předmět: |
|
| Zdroj: |
Journal of Alloys and Compounds. 225:159-162 |
| ISSN: |
0925-8388 |
| DOI: |
10.1016/0925-8388(94)07026-1 |
| Popis: |
GdTe is a fee antiferromagnetic metal. By substituting Gd3+ by non-magnetic divalent or trivalent rare-earth ions we generate magnetically diluted solid solutions in which the free-carrier concentration (n) and/or the lattice parameter depend on the substitution rate. In this paper, we report on the magnetic properties of the metallic La1−xGdxTe solid solution where n does not depend significantly on x. The evolution of the Neel temperature with x is discussed and compared with the evolution observed in the Yb1−xGdxTe system, where the free-carrier concentration varies with composition. In (La1−zYz)1−xGdxTe, we are able to control independently the free-carrier concentration and the lattice parameter. The comparison of the Neel temperature for these three solid solutions at the same Gd concentration gives evidence that the decrease of the Neel temperature vs. x in both La-based solid solutions is a pure spin-dilution effect. The fact than TN is smaller in metallic solid solutions than in Yb1−xGdxTe is due to a shift in the wavevector (≈kF) of the oscillations in the Ruderman-Kittel-Kasuya-Yoshida interaction. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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