In:
Journal of Applied Physics, AIP Publishing, Vol. 92, No. 12 ( 2002-12-15), p. 7392-7396
Kurzfassung:
Single-phase Gd2Co17−xVx compounds (x=0.0–1.5) crystallizing in the rhombohedral Th2Zn17 structure have been synthesized. The lattice parameters a and c of the compounds increase linearly with increasing V content, and the rate of increase of c is about 2.5 times as large as that of a. Substitution of a small amount of V atoms (x=0.3) for Co atoms leads to the occurrence of uniaxial magnetocrystalline anisotropy of Gd2Co17−xVx. The anisotropy field HA increases drastically with increasing V content. The variations of both the lattice parameters and the magnetocrystalline anisotropy with V content suggest a preferential occupation of the V atoms at the 6c dumbbell site. The Curie temperature TC, saturation moment MS, and average Co moment 〈μCo〉 of the compounds decrease greatly as the V content increases. The rapid decrease of TC is essentially attributed to a serious weakening of the Co-Co interactions due to the preferential occupation of the V atoms at the 6c site. The effect of a strong hybridization between the V and Co atoms is plausibly responsible for the decreases of the MS and 〈μCo〉.
Materialart:
Online-Ressource
ISSN:
0021-8979
,
1089-7550
Sprache:
Englisch
Verlag:
AIP Publishing
Publikationsdatum:
2002
ZDB Id:
220641-9
ZDB Id:
3112-4
ZDB Id:
1476463-5
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