Crossover from antiferromagnetic Kondo metal to Kondo insulator in Ce(Pt1-xNix)Sn alloys

被引：20

作者：

Adroja, DT ^{[1
]}

Rainford, BD ^{[1
]}

Neville, AJ ^{[1
]}

Jansen, AGM ^{[1
]}

机构：

[1] MPI, CNRS, HIGH FIELD MAGNET LAB, GRENOBLE 9, FRANCE

来源：

PHYSICA B-CONDENSED MATTER | 1996年 / 223-24卷 / 1-4期

关键词：

D O I：

10.1016/0921-4526(96)00098-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Transport, magnetic, inelastic neutron scattering and high field magnetoresistance measurements have been made on Ce(Pt(1-x)Ni(x))Sn alloys, in order to investigate the crossover from the antiferromagnetic Kondo metal (CePtSn) to the Kondo insulator (CeNiSn). Inelastic neutron scattering from CePtSn shows two well-defined crystal field excitations. These broaden with increasing Ni content x in Ce(Pt(1-x)Ni(x))Sn. CeNiSn shows a single broad inelastic excitation. High field magnetoresistance of CePtSn and CePt(0.5)Ni(0.5)Sn shows good agreement with Schlottmann's J=1/2 Kondo impurity model. CeNiSn exhibits a large negative magnetoresistance (-41% at 20 T and 1.7K) arising from the suppression of the energy gap with field.

引用

页码：275 / 278

页数：4

共 7 条

[1] MAGNETIC AND TRANSPORT STUDIES OF THE ANTIFERROMAGNETIC KONDO-LATTICE CEPTSN [J].