Direct observation of Fe spin reorientation in single crystalline YbFe6Ge6

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We have grown single crystals of YbFe6Ge6 and LuFe6Ge6 and characterized their anisotropic behaviour through low field magnetic susceptibility, field-dependent magnetization, resistivity and heat capacity measurements. The Yb+3 valency is confirmed by LIII XANES measurements. YbFe6Ge6 crystals exhibit a field-dependent, sudden reorientation of the Fe spins at about 63 K, a unique effect in the RFe6Ge6 family (R = rare earths) where the Fe ions order anti-ferromagnetically with Neel temperatures above 450 K and the R ions' magnetism appears to behave independently. The possible origins of this unusual behaviour of the ordered Fe moments in this compound are discussed.
12 pages, 8 figures, accepted in J. Phys.: Cond. Matter

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/95641

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0508507
 http://arxiv.org/abs/cond-mat/0508507
 J. Phys.: Condens. Matter 17 (2005) 6969-6979.
 doi:10.1088/0953-8984/17/43/014

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arXiv