Specific heat anomaly due to valence transition in Eu(Pd1-xPtx)2Si2

H. Wada; H. Gomi; A. Mitsuda; M. Shiga

doi:10.1016/S0038-1098(01)00025-4

Specific heat anomaly due to valence transition in Eu(Pd_1-xPt_x)₂Si₂

H. Wada, H. Gomi, A. Mitsuda, M. Shiga

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

7 Citations (Scopus)

Abstract

Specific heat was measured for Eu(Pd_1-xPt_x)₂Si₂ with 0≤x≤0.10, in which the Eu valence sharply varies with temperature. A large specific heat peak due to the valence change was observed in each compound. Using the specific heat of LaPd₂Si₂ as a normal part, we estimated the entropy associated with valence transition. It was found that the entropy increases abruptly around the valence transition temperature and reaches a saturation value of 22-23 J/K mol at room temperature. The temperature dependence of the entropy associated with the valence transition was calculated in terms of the interconfigurational fluctuation (ICF) model. We will demonstrate that the experimental results are well described by the ICF model.

Original language	English
Pages (from-to)	703-707
Number of pages	5
Journal	Solid State Communications
Volume	117
Issue number	12
DOIs	https://doi.org/10.1016/S0038-1098(01)00025-4
Publication status	Published - Mar 12 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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10.1016/S0038-1098(01)00025-4

Cite this

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title = "Specific heat anomaly due to valence transition in Eu(Pd1-xPtx)2Si2",

abstract = "Specific heat was measured for Eu(Pd1-xPtx)2Si2 with 0≤x≤0.10, in which the Eu valence sharply varies with temperature. A large specific heat peak due to the valence change was observed in each compound. Using the specific heat of LaPd2Si2 as a normal part, we estimated the entropy associated with valence transition. It was found that the entropy increases abruptly around the valence transition temperature and reaches a saturation value of 22-23 J/K mol at room temperature. The temperature dependence of the entropy associated with the valence transition was calculated in terms of the interconfigurational fluctuation (ICF) model. We will demonstrate that the experimental results are well described by the ICF model.",

author = "H. Wada and H. Gomi and A. Mitsuda and M. Shiga",

note = "Funding Information: This work was partly supported by a Grant-in Aid for Scientific Research from the Ministry of Education, Science and Culture. One of the authors (AM) also acknowledges support from Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists.",

year = "2001",

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doi = "10.1016/S0038-1098(01)00025-4",

language = "English",

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pages = "703--707",

journal = "Solid State Communications",

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TY - JOUR

T1 - Specific heat anomaly due to valence transition in Eu(Pd1-xPtx)2Si2

AU - Wada, H.

AU - Gomi, H.

AU - Mitsuda, A.

AU - Shiga, M.

N1 - Funding Information: This work was partly supported by a Grant-in Aid for Scientific Research from the Ministry of Education, Science and Culture. One of the authors (AM) also acknowledges support from Research Fellowships of the Japan Society for the Promotion of Science for Young Scientists.

PY - 2001/3/12

Y1 - 2001/3/12

N2 - Specific heat was measured for Eu(Pd1-xPtx)2Si2 with 0≤x≤0.10, in which the Eu valence sharply varies with temperature. A large specific heat peak due to the valence change was observed in each compound. Using the specific heat of LaPd2Si2 as a normal part, we estimated the entropy associated with valence transition. It was found that the entropy increases abruptly around the valence transition temperature and reaches a saturation value of 22-23 J/K mol at room temperature. The temperature dependence of the entropy associated with the valence transition was calculated in terms of the interconfigurational fluctuation (ICF) model. We will demonstrate that the experimental results are well described by the ICF model.

AB - Specific heat was measured for Eu(Pd1-xPtx)2Si2 with 0≤x≤0.10, in which the Eu valence sharply varies with temperature. A large specific heat peak due to the valence change was observed in each compound. Using the specific heat of LaPd2Si2 as a normal part, we estimated the entropy associated with valence transition. It was found that the entropy increases abruptly around the valence transition temperature and reaches a saturation value of 22-23 J/K mol at room temperature. The temperature dependence of the entropy associated with the valence transition was calculated in terms of the interconfigurational fluctuation (ICF) model. We will demonstrate that the experimental results are well described by the ICF model.

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DO - 10.1016/S0038-1098(01)00025-4

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SN - 0038-1098

VL - 117

SP - 703

EP - 707

JO - Solid State Communications

JF - Solid State Communications

IS - 12

ER -

Specific heat anomaly due to valence transition in Eu(Pd_1-xPt_x)₂Si₂

Abstract

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