Non-magnetic-doublet ground state in PrInCu2; Enhancement of the specific-heat coefficient at low temperatures

Tsuyoshi Ikeno; Yosikazu Isikawa; Tomohiko Kuwai; Akihiro Mitsuda; Toshio Mizushima

doi:10.1016/j.physb.2006.01.190

Non-magnetic-doublet ground state in PrInCu₂; Enhancement of the specific-heat coefficient at low temperatures

Tsuyoshi Ikeno, Yosikazu Isikawa^*, Tomohiko Kuwai, Akihiro Mitsuda, Toshio Mizushima

^*Corresponding author for this work

Department of Physics

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

7 Scopus citations

Abstract

Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu₂ have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K² at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at E_F do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu₂ is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.

Original language	English
Pages (from-to)	677-678
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.190
State	Published - 2006/05/01

Keywords

Heusler compound
Non-magnetic doublet
PrInCu
Specific heat
Thermoelectric power

ASJC Scopus subject areas

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

Access to Document

10.1016/j.physb.2006.01.190

Cite this

@article{7d1b51f4f58d48c09e1aaa9718e42c27,

title = "Non-magnetic-doublet ground state in PrInCu2; Enhancement of the specific-heat coefficient at low temperatures",

abstract = "Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu2 have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K2 at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at EF do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu2 is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.",

keywords = "Heusler compound, Non-magnetic doublet, PrInCu, Specific heat, Thermoelectric power",

author = "Tsuyoshi Ikeno and Yosikazu Isikawa and Tomohiko Kuwai and Akihiro Mitsuda and Toshio Mizushima",

year = "2006",

month = may,

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doi = "10.1016/j.physb.2006.01.190",

language = "英語",

volume = "378-380",

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journal = "Physica B: Condensed Matter",

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TY - JOUR

T1 - Non-magnetic-doublet ground state in PrInCu2; Enhancement of the specific-heat coefficient at low temperatures

AU - Ikeno, Tsuyoshi

AU - Isikawa, Yosikazu

AU - Kuwai, Tomohiko

AU - Mitsuda, Akihiro

AU - Mizushima, Toshio

PY - 2006/5/1

Y1 - 2006/5/1

N2 - Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu2 have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K2 at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at EF do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu2 is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.

AB - Specific heat, C, thermoelectric power, S, and magnetic susceptibility, χ, of a cubic Heusler compound PrInCu2 have been carefully examined. The C / T shows an enhancement with decreasing T and reaches 1.1 J / mol K2 at 0.5 K, while the S / T does not show any enhancement at temperatures below 1 K. These observations suggest that the conduction electrons at EF do not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. To explain the enhancement of the C / T at low temperatures, a model that the non-magnetic doublet of PrInCu2 is lifted by quadrupole fluctuations was proposed. From the analysis of overall features of C ( T ) and χ ( T ), the energy scheme of 4f electrons was derived.

KW - Heusler compound

KW - Non-magnetic doublet

KW - PrInCu

KW - Specific heat

KW - Thermoelectric power

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