Approach to Curie-Weiss paramagnetism in the metallic perovskites La1-xNdxCuO3

被引：14

作者：

Zhou, JS ^{[1
]}

Archibald, W ^{[1
]}

Goodenough, JB ^{[1
]}

机构：

[1] Univ Texas, Texas Mat Inst, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.61.3196

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A procedure for the preparation of the starting oxides has allowed phase-pure synthesis of the rhombohedral, metallic perovskite system La1-xNdxCuO3 (0 less than or equal to x less than or equal to 0.6) under 25 kbar oxygen pressure at 900-1000 degrees C. It was not possible to exceed the x = 0.6 limit with 65 kbar at 1600 degrees C. Measurement of the CuO3-sublattice contribution to the paramagnetic susceptibility X-m(T) was obtained for samples of different x by an appropriate subtraction of the Nd3+-ion contribution as obtained from measurement of X-m(T) for NdAlO3. The data are qualitatively compatible with the Mott prediction for a mass-enhanced X-m(T) of a half-filled band that approaches the Mott-Hubbard transition from the itinerant-electron side. However, a model of strong-correlation fluctuations in a mass-enhanced Fermi liquid provides an alternative description of the data that is supported by transport measurements and a remarkable sensitivity of the susceptibility to small structural changes.

引用

页码：3196 / 3199

页数：4

共 14 条

[1] TEMPERATURE DEPENDENCE OF SPIN SUSCEPTIBILITY OF A NEARLY FERROMAGNETIC FERMI LIQUID [J].