Inhomogeneous level splitting in Pr 2-x BixRu2O7.
We report that Bi doping drives Pr 2-x BixRu2O7 from an antiferromagnetic insulator (x = 0) to a metallic paramagnet (x approximately 1) with a broad low T maximum in C/T. Neutron scattering reveals local low energy spin excitations (variant Planck's omega approximately 1 meV) with a spectrum that is unaffected by heating to k(B)T >> variant Planck's omega. We show that a continuous distribution of splittings of the non-Kramers Pr3+ ground-state doublet such as might result from various types of lattice strain can account for all the data.
van Duijn
J
J
Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Kim
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KH
Hur
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Adroja
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D
Adams
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Huang
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Jaime
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Cheong
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Broholm
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Perring
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TG