Mixed Linear (M,Sb) Chains in the New Antimonides Hf10MδSb6–δ (M = V, Cr, Mn, Fe, Co, Ni, Cu): Crystal and Electronic Structures, Phase Ranges, and Electrical and Magnetic Properties
✍ Scribed by Holger Kleinke; Christel Ruckert; Claudia Felser
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 416 KB
- Volume
- 2000
- Category
- Article
- ISSN
- 1434-1948
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✦ Synopsis
The title compounds can be synthesized in quantitative interactions within the linear (M,Sb) chain. The metallic character was confirmed by measurements of the electrical yields by arc-melting of stoichiometric amounts of HfSb 2 , Hf and one of the 3d metals V, Cr, Mn, Fe, Co, Ni, and Cu. These resistivity and the magnetism of selected samples. Whereas Pauli paramagnetism was observed experimentally for M = antimonides crystallize in a substitution variant of the W 5 Si 3 type, in which one position is statistically mixed, occupied by V, Co, and Ni, Hf 10 FeSb 5 is apparently the only phase with localized magnetic moments and magnetic coupling. This is the 3d metal atom M or the Sb2 atom in different ratios. Within the linear (M,Sb) chain, the M:Sb ratio may vary in agreement with the magnetic ground state obtained solely for the ordered structure model of Hf 10 FeSb 5 with spin-between 3:1 and 2:3. According to calculations of the electronic structures of Hf 10 M δ Sb 6-δ with δ = 1, these phases polarized calculation within the local spin density approximation. are metallic compounds stabilized by strong Hf-Hf, Hf-M, and Hf-Sb bonds, and to a smaller extent by bonding this chain would maximize the MϪSb bonds and prohibit