Observation of field-induced single impurity behavior in the heavy fermion compound Ce3 Co4 Sn13

A. L. Cornelius; A. D. Christianson; J. L. Lawrence; V. Fritsch; E. D. Bauer; J. L. Sarrao; J. D. Thompson; P. G. Pagliuso

doi:10.1016/j.physb.2006.01.259

Observation of field-induced single impurity behavior in the heavy fermion compound Ce₃ Co₄ Sn₁₃

A. L. Cornelius, A. D. Christianson, J. L. Lawrence, V. Fritsch, E. D. Bauer, J. L. Sarrao, J. D. Thompson, P. G. Pagliuso

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

37 Scopus citations

Abstract

We have performed heat capacity measurements in magnetic fields to 90 kOe on single crystals of the cubic heavy fermion compound Ce₃ Co₄ Sn₁₃. In zero field, there are no signs of long-range magnetic order down to 0.35 K. However, C / T increases rapidly below 2 K, reaching a very large maximum value of ∼ 4 J / mol Ce-K around 0.8 K in zero field, and the high-field magnetic entropy approaches R ln 2 at 20 K. Above 25 kOe, the data are consistent with a Kondo impurity with T_K = 1.2 K. Short-range magnetic correlations are suppressed by magnetic fields giving way to single impurity behavior above 25 kOe.

Original language	English
Pages (from-to)	113-114
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.259
State	Published - May 1 2006
Externally published	Yes

Funding

Work at UNLV is supported by the UNLV High Pressure Science and Engineering Center supported by the US Department of Energy, National Nuclear Security Administration, under Cooperative Agreement DE-FC08-01NV14049. Work at UC Irvine was supported by the US Department of Energy (DOE) under Grant No. DE-FG03-03ER46036. Work at Los Alamos was performed under the auspices of the DOE. P. G. P also thanks Fapesp-SP and CNPq-Br.

Keywords

Heat capacity
Heavy fermion
Quantum critical point

Access to Document

10.1016/j.physb.2006.01.259

Cite this

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title = "Observation of field-induced single impurity behavior in the heavy fermion compound Ce3 Co4 Sn13",

abstract = "We have performed heat capacity measurements in magnetic fields to 90 kOe on single crystals of the cubic heavy fermion compound Ce3 Co4 Sn13. In zero field, there are no signs of long-range magnetic order down to 0.35 K. However, C / T increases rapidly below 2 K, reaching a very large maximum value of ∼ 4 J / mol Ce-K around 0.8 K in zero field, and the high-field magnetic entropy approaches R ln 2 at 20 K. Above 25 kOe, the data are consistent with a Kondo impurity with TK = 1.2 K. Short-range magnetic correlations are suppressed by magnetic fields giving way to single impurity behavior above 25 kOe.",

keywords = "Heat capacity, Heavy fermion, Quantum critical point",

author = "Cornelius, {A. L.} and Christianson, {A. D.} and Lawrence, {J. L.} and V. Fritsch and Bauer, {E. D.} and Sarrao, {J. L.} and Thompson, {J. D.} and Pagliuso, {P. G.}",

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T1 - Observation of field-induced single impurity behavior in the heavy fermion compound Ce3 Co4 Sn13

AU - Cornelius, A. L.

AU - Christianson, A. D.

AU - Lawrence, J. L.

AU - Fritsch, V.

AU - Bauer, E. D.

AU - Sarrao, J. L.

AU - Thompson, J. D.

AU - Pagliuso, P. G.

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Y1 - 2006/5/1

N2 - We have performed heat capacity measurements in magnetic fields to 90 kOe on single crystals of the cubic heavy fermion compound Ce3 Co4 Sn13. In zero field, there are no signs of long-range magnetic order down to 0.35 K. However, C / T increases rapidly below 2 K, reaching a very large maximum value of ∼ 4 J / mol Ce-K around 0.8 K in zero field, and the high-field magnetic entropy approaches R ln 2 at 20 K. Above 25 kOe, the data are consistent with a Kondo impurity with TK = 1.2 K. Short-range magnetic correlations are suppressed by magnetic fields giving way to single impurity behavior above 25 kOe.

AB - We have performed heat capacity measurements in magnetic fields to 90 kOe on single crystals of the cubic heavy fermion compound Ce3 Co4 Sn13. In zero field, there are no signs of long-range magnetic order down to 0.35 K. However, C / T increases rapidly below 2 K, reaching a very large maximum value of ∼ 4 J / mol Ce-K around 0.8 K in zero field, and the high-field magnetic entropy approaches R ln 2 at 20 K. Above 25 kOe, the data are consistent with a Kondo impurity with TK = 1.2 K. Short-range magnetic correlations are suppressed by magnetic fields giving way to single impurity behavior above 25 kOe.

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