Anomalous magnetic response of the valence-fluctuating compound YbInCu4

Details Anomalous magnetic response of the valence-fluctuating compound YbInCu4 Anomalous magnetic response of the valence-fluctuating compound YbInCu4

1996-07-09

arxiv.org/abs/cond-mat/9607068v1

Physics

Condensed Matter

5 pages, ReVTeX, 6 encapsulated postscript figures included

Scientific paper

The exact solution of the spin one-half Falicov-Kimball model, with random hopping between the lattice sites, is used to explain the anomalous magnetic response of Yb-based valence-fluctuating intermetallic compounds. The anomalous behavior arises from an entropy-driven local-moment--nonmagnetic transition of unhybridized Yb ions in these materials which can also be used to explain the observed metamagnetism and resistivity anomalies.

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