Non-enhancement of thermoelectric-power coefficient of PrInAg2 at low temperatures

Y. Isikawa; T. Ikeno; T. Sugihara; T. Kinoshita; T. Kuwai; T. Mizushima

doi:10.1016/j.jmmm.2006.10.047

Non-enhancement of thermoelectric-power coefficient of PrInAg₂ at low temperatures

Y. Isikawa^*, T. Ikeno, T. Sugihara, T. Kinoshita, T. Kuwai, T. Mizushima

^*Corresponding author for this work

Department of Physics

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

6 Scopus citations

Abstract

The thermoelectric power, S, of PrInAg₂ was measured at the temperature range down to 0.1 K to clarify whether the thermoelectric-power coefficient, S / T, is enhanced at low temperatures or not. PrInAg₂ has a huge enhancement of electronic-specific heat coefficient, C / T, at low temperatures, and the S / T is well known to correlate with the C / T for Ce-based heavy-fermion compounds. The value of | S | / T obtained is, however, 0.01μ V / K² at most, and there is no indication of the enhancement of S / T. These observations suggest that the conduction electrons at E_F does not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. We propose a quadrupole-fluctuation model to explain this enhancement of C / T of PrInAg₂ at low temperatures.

Original language	English
Pages (from-to)	289-291
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 1
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.047
State	Published - 2007/03

Keywords

Heusler compound
Non-magnetic-doublet ground state
PrInAg
Thermoelectric power

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2006.10.047

Cite this

@article{882453e00d284b5e8cf891e77534ddaa,

title = "Non-enhancement of thermoelectric-power coefficient of PrInAg2 at low temperatures",

abstract = "The thermoelectric power, S, of PrInAg2 was measured at the temperature range down to 0.1 K to clarify whether the thermoelectric-power coefficient, S / T, is enhanced at low temperatures or not. PrInAg2 has a huge enhancement of electronic-specific heat coefficient, C / T, at low temperatures, and the S / T is well known to correlate with the C / T for Ce-based heavy-fermion compounds. The value of | S | / T obtained is, however, 0.01μ V / K2 at most, and there is no indication of the enhancement of S / T. These observations suggest that the conduction electrons at EF does not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. We propose a quadrupole-fluctuation model to explain this enhancement of C / T of PrInAg2 at low temperatures.",

keywords = "Heusler compound, Non-magnetic-doublet ground state, PrInAg, Thermoelectric power",

author = "Y. Isikawa and T. Ikeno and T. Sugihara and T. Kinoshita and T. Kuwai and T. Mizushima",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.047",

language = "英語",

volume = "310",

pages = "289--291",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier B.V.",

number = "2 SUPPL. PART 1",

}

TY - JOUR

T1 - Non-enhancement of thermoelectric-power coefficient of PrInAg2 at low temperatures

AU - Isikawa, Y.

AU - Ikeno, T.

AU - Sugihara, T.

AU - Kinoshita, T.

AU - Kuwai, T.

AU - Mizushima, T.

PY - 2007/3

Y1 - 2007/3

N2 - The thermoelectric power, S, of PrInAg2 was measured at the temperature range down to 0.1 K to clarify whether the thermoelectric-power coefficient, S / T, is enhanced at low temperatures or not. PrInAg2 has a huge enhancement of electronic-specific heat coefficient, C / T, at low temperatures, and the S / T is well known to correlate with the C / T for Ce-based heavy-fermion compounds. The value of | S | / T obtained is, however, 0.01μ V / K2 at most, and there is no indication of the enhancement of S / T. These observations suggest that the conduction electrons at EF does not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. We propose a quadrupole-fluctuation model to explain this enhancement of C / T of PrInAg2 at low temperatures.

AB - The thermoelectric power, S, of PrInAg2 was measured at the temperature range down to 0.1 K to clarify whether the thermoelectric-power coefficient, S / T, is enhanced at low temperatures or not. PrInAg2 has a huge enhancement of electronic-specific heat coefficient, C / T, at low temperatures, and the S / T is well known to correlate with the C / T for Ce-based heavy-fermion compounds. The value of | S | / T obtained is, however, 0.01μ V / K2 at most, and there is no indication of the enhancement of S / T. These observations suggest that the conduction electrons at EF does not correlate with the 4f electrons of Pr atoms and that the enhancement of C / T is not due to the Kondo effect. We propose a quadrupole-fluctuation model to explain this enhancement of C / T of PrInAg2 at low temperatures.

KW - Heusler compound

KW - Non-magnetic-doublet ground state

KW - PrInAg

KW - Thermoelectric power

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DO - 10.1016/j.jmmm.2006.10.047

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VL - 310

SP - 289

EP - 291

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 1

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