Magnetic field induced effects in the quasikagome Kondo lattice system CePtPb

A. C.Y. Fang; S. R. Dunsiger; A. Pal; K. Akintola; J. E. Sonier; E. Mun

doi:10.1103/PhysRevB.100.024404

Magnetic field induced effects in the quasikagome Kondo lattice system CePtPb

A. C.Y. Fang, S. R. Dunsiger, A. Pal, K. Akintola, J. E. Sonier, E. Mun

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

3 Citations (Scopus)

Abstract

The Kondo lattice compound CePtPb crystallizes in the ZrNiAl-type structure with the space group P62m, where the Ce3+ ions form a quasikagome lattice in the ab plane. We have constructed a temperature versus magnetic field (T-H) phase diagram for single-crystal CePtPb from electrical resistivity and specific heat measurements. Our results indicate the occurrence of long-range antiferromagnetic order below TN=0.95K and multiple magnetically ordered phases as TN is suppressed by applied magnetic field. Although TN can be continuously suppressed to zero by the field, the resistivity and specific heat close to the critical field Hc≈6 kOe do not follow simple models of quantum criticality. Above Hc, the electrical resistivity shows an unconventional Tn dependence with n>2. We also present muon spin relaxation measurements, which reveal residual spin dynamics below TN that are consistent with only two thirds of the Ce-4f spins participating in the antiferromagnetic order.

Original language	English
Article number	024404
Journal	Physical Review B
Volume	100
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.100.024404
Publication status	Published - 02-07-2019

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.100.024404

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title = "Magnetic field induced effects in the quasikagome Kondo lattice system CePtPb",

abstract = "The Kondo lattice compound CePtPb crystallizes in the ZrNiAl-type structure with the space group P62m, where the Ce3+ ions form a quasikagome lattice in the ab plane. We have constructed a temperature versus magnetic field (T-H) phase diagram for single-crystal CePtPb from electrical resistivity and specific heat measurements. Our results indicate the occurrence of long-range antiferromagnetic order below TN=0.95K and multiple magnetically ordered phases as TN is suppressed by applied magnetic field. Although TN can be continuously suppressed to zero by the field, the resistivity and specific heat close to the critical field Hc≈6 kOe do not follow simple models of quantum criticality. Above Hc, the electrical resistivity shows an unconventional Tn dependence with n>2. We also present muon spin relaxation measurements, which reveal residual spin dynamics below TN that are consistent with only two thirds of the Ce-4f spins participating in the antiferromagnetic order.",

author = "Fang, {A. C.Y.} and Dunsiger, {S. R.} and A. Pal and K. Akintola and Sonier, {J. E.} and E. Mun",

note = "Funding Information: This work was supported by the Canada Research Chairs program, the Natural Science and Engineering Research Council of Canada, the Canadian Institute for Advanced Research, and the Canadian Foundation for Innovation. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",

year = "2019",

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doi = "10.1103/PhysRevB.100.024404",

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T1 - Magnetic field induced effects in the quasikagome Kondo lattice system CePtPb

AU - Fang, A. C.Y.

AU - Dunsiger, S. R.

AU - Pal, A.

AU - Akintola, K.

AU - Sonier, J. E.

AU - Mun, E.

N1 - Funding Information: This work was supported by the Canada Research Chairs program, the Natural Science and Engineering Research Council of Canada, the Canadian Institute for Advanced Research, and the Canadian Foundation for Innovation. Publisher Copyright: © 2019 American Physical Society.

PY - 2019/7/2

Y1 - 2019/7/2

N2 - The Kondo lattice compound CePtPb crystallizes in the ZrNiAl-type structure with the space group P62m, where the Ce3+ ions form a quasikagome lattice in the ab plane. We have constructed a temperature versus magnetic field (T-H) phase diagram for single-crystal CePtPb from electrical resistivity and specific heat measurements. Our results indicate the occurrence of long-range antiferromagnetic order below TN=0.95K and multiple magnetically ordered phases as TN is suppressed by applied magnetic field. Although TN can be continuously suppressed to zero by the field, the resistivity and specific heat close to the critical field Hc≈6 kOe do not follow simple models of quantum criticality. Above Hc, the electrical resistivity shows an unconventional Tn dependence with n>2. We also present muon spin relaxation measurements, which reveal residual spin dynamics below TN that are consistent with only two thirds of the Ce-4f spins participating in the antiferromagnetic order.

AB - The Kondo lattice compound CePtPb crystallizes in the ZrNiAl-type structure with the space group P62m, where the Ce3+ ions form a quasikagome lattice in the ab plane. We have constructed a temperature versus magnetic field (T-H) phase diagram for single-crystal CePtPb from electrical resistivity and specific heat measurements. Our results indicate the occurrence of long-range antiferromagnetic order below TN=0.95K and multiple magnetically ordered phases as TN is suppressed by applied magnetic field. Although TN can be continuously suppressed to zero by the field, the resistivity and specific heat close to the critical field Hc≈6 kOe do not follow simple models of quantum criticality. Above Hc, the electrical resistivity shows an unconventional Tn dependence with n>2. We also present muon spin relaxation measurements, which reveal residual spin dynamics below TN that are consistent with only two thirds of the Ce-4f spins participating in the antiferromagnetic order.

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Magnetic field induced effects in the quasikagome Kondo lattice system CePtPb

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