Nonlinear susceptibility:: Evidence for antiferroquadrupolar fluctuations and a nonmagnetic Γ1 ground state in the heavy fermion superconductor PrOs4Sb12

被引：16

作者：

Bauer, ED ^{[1
]}

Ho, PC

Maple, MB

Schauerte, T

Cox, DL

Anders, FB

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA

[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

[4] Tech Univ Darmstadt, Inst Festkorperphys, D-64289 Darmstadt, Germany

来源：

PHYSICAL REVIEW B | 2006年 / 73卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.73.094511

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nonlinear susceptibility (chi(3)) measurements were performed on single crystals of the heavy fermion superconductor PrOs4Sb12 in order to probe the nature of the Pr3+ ground state in the crystalline electric field. Calculations of chi(3)(T) have been carried out (i) within a mean field model of intersite magnetic and quadrupolar interactions for an ionic (zero hybridization) crystal field Gamma(1) singlet ground state and a first excited state magnetic triplet, and (ii) within a two-channel Anderson impurity model assuming a Gamma(23) doublet ground state. The experimental chi(3) results are in best agreement with the nonmagnetic Gamma(1) ground state in the tetrahedral crystalline electric field of the Pr3+ ions with antiferroquadrupolar intersite coupling and weak antiferromagnetic intersite coupling.

引用

页数：7

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