The g-value of Er3+ doped unfilled skutterudite CoSb3 (Th) reveals the existence of an additional sixth order term in the crystal field Hamiltonian

Electron spin resonance (ESR) experiments have been carried out in single crystals of the unfilled skutterudite CoSb3 doped with Er ions. The X- (9.5GHz) and Q- (34.4GHz) band spectra obtained at low temperature (4–20K) shown a temperature independent g-value of 6.21(5). This g-value can only be exp...

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Veröffentlicht in:	Physica. B, Condensed matter Condensed matter, 2009-10, Vol.404 (19), p.3035-3037
Hauptverfasser:	Vargas, J.M., Garcia, F.A., Rettori, C., Garcia, D.J., Sales, B., Schlottmann, P., Oseroff, S.B.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antimonides Condensed matter: electronic structure, electrical, magnetic, and optical properties Electron paramagnetic resonance and relaxation Exact sciences and technology Filled skutterudite formula omitted Magnetic resonances and relaxations in condensed matter, mössbauer effect Physics Rare-earth metal
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Zusammenfassung:	Electron spin resonance (ESR) experiments have been carried out in single crystals of the unfilled skutterudite CoSb3 doped with Er ions. The X- (9.5GHz) and Q- (34.4GHz) band spectra obtained at low temperature (4–20K) shown a temperature independent g-value of 6.21(5). This g-value can only be explained with the addition of a second sixth order B6t(O62-O66) term to the usual cubic crystal field Hamiltonian. The ESR of Er3+ show the typical temperature dependence of the line-shape and line-width expected for insulating host.
ISSN:	0921-4526 1873-2135
DOI:	10.1016/j.physb.2009.07.012