La impurity effects on quadrupolar ordering in PrPb3

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Published
2001-11-30
Resource Type
journal article
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  • Copyright © 2002 American Physical Society
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Published by the American Physical Society through the American Institute of Physics

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Description

We study low-temperature properties of Pr1−xLaxPb3 with the ground state of a non-Kramers Γ3 for 0≦x≦0.8. From the concentration dependence of the specific heat, quadrupolar ordering is expected to occur only up to x∼0.02. For a wide range of La concentrations where the ordering is absent, the specific heat shows a T linear variation, which is in an excellent agreement with the result obtained by the model for amorphous materials with a random configuration of a two-level system. Impurity effects on quadrupolar moments will be discussed.

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