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

D. T. Adroja; B. D. Rainford; A. J. Neville; A. G.M. Jansen

doi:10.1016/0921-4526(96)00098-1

Crossover from antiferromagnetic Kondo metal to Kondo insulator in Ce(Pt_1-xNi_x)Sn alloys

D. T. Adroja, B. D. Rainford, A. J. Neville, A. G.M. Jansen

Physics

CNRS

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

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_0.5Ni_0.5Sn shows good agreement with Schlottmann's J = 1/2 Kondo impurity model. CeNiSn exhibits a large negative magnetoresistance ( - 41% at 20 T and 1.7 K) arising from the suppression of the energy gap with field.

Original language	English
Pages (from-to)	275-278
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	223-224
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(96)00098-1
Publication status	Published - 2 Jun 1996

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(96)00098-1

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abstract = "Transport, magnetic, inelastic neutron scattering and high field magnetoresistance measurements have been made on Ce(Pt1 - xNix)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(Pt1 - xNix)Sn. CeNiSn shows a single broad inelastic excitation. High field magnetoresistance of CePtSn and CePt0.5Ni0.5Sn shows good agreement with Schlottmann's J = 1/2 Kondo impurity model. CeNiSn exhibits a large negative magnetoresistance ( - 41% at 20 T and 1.7 K) arising from the suppression of the energy gap with field.",

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AU - Adroja, D. T.

AU - Rainford, B. D.

AU - Neville, A. J.

AU - Jansen, A. G.M.

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N2 - Transport, magnetic, inelastic neutron scattering and high field magnetoresistance measurements have been made on Ce(Pt1 - xNix)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(Pt1 - xNix)Sn. CeNiSn shows a single broad inelastic excitation. High field magnetoresistance of CePtSn and CePt0.5Ni0.5Sn shows good agreement with Schlottmann's J = 1/2 Kondo impurity model. CeNiSn exhibits a large negative magnetoresistance ( - 41% at 20 T and 1.7 K) arising from the suppression of the energy gap with field.

AB - Transport, magnetic, inelastic neutron scattering and high field magnetoresistance measurements have been made on Ce(Pt1 - xNix)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(Pt1 - xNix)Sn. CeNiSn shows a single broad inelastic excitation. High field magnetoresistance of CePtSn and CePt0.5Ni0.5Sn shows good agreement with Schlottmann's J = 1/2 Kondo impurity model. CeNiSn exhibits a large negative magnetoresistance ( - 41% at 20 T and 1.7 K) arising from the suppression of the energy gap with field.

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Crossover from antiferromagnetic Kondo metal to Kondo insulator in Ce(Pt_1-xNi_x)Sn alloys

Abstract

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