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Magnetic Fluctuations of Filled Skutterudites Emerging in the Transition Region between Singlet and Triplet States

Takashi Hotta
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Abstract

In order to clarify magnetic properties of filled skutterudites, we analyze the Anderson model including seven $f$ orbitals hybridized with an $a_{\rm u}$ conduction band using a numerical technique. For $n$=2 corresponding to Pr-based filled skutterudites, where $n$ is the local $f$-electron number, even if the ground state is a singlet, there remain significant magnetic fluctuations from a triplet state with a small excitation energy. This result can be understood by the fact that $f$-electron states are clearly distinguished as itinerant and localized ones in the filled skutterudite structure. This picture also explains the complex results for $f$-electron magnetic susceptibility and entropy for $n$=1$\sim$13.

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Takashi Hotta. 2005-04-03. Magnetic Fluctuations of Filled Skutterudites Emerging in the Transition Region between Singlet and Triplet States. https://doi.org/10.1103/physrevlett.94.067003

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