Thermoelectric power of MgB2

D. C. Kim; J. S. Kim; B. H. Kim; Y. W. Park; C. U. Jung; S. I. Lee

doi:10.1016/S0921-4534(03)00626-9

Thermoelectric power of MgB2

D. C. Kim
, J. S. Kim
, B. H. Kim
, Y. W. Park
, C. U. Jung
, S. I. Lee

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

10 Scopus citations

Abstract

Thermoelectric power (TEP) of MgB₂ and its changes with the superconducting transition temperature (T_c) have been investigated. MgB₂ samples synthesized with different techniques - sample 1 by the encapsulation method and sample 2 by the high pressure and high temperature technique - showed different T_c (T_c of sample 1 = 38.7 K, and T_c of sample 2 = 40.4 K). The characteristic features of the TEP of these samples - low temperature linear behavior, deviation from the low temperature linear behavior at a certain temperature, and an almost saturating value at ∼300 K - were found to vary systematically with T_c, consistent with the previously reported TEP changes in Mg_1-xAl_xB₂. These changes of the TEP behaviors with T_c in the superconducting diborides system are discussed in comparison with those of high T_c cuprates and bismuthates. The common feature of the saturating TEP at high temperatures suggests the importance of an anharmonic electron-phonon interaction. © 2003 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	313-320
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	387
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(03)00626-9
State	Published - May 15 2003
Externally published	Yes

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title = "Thermoelectric power of MgB2",

abstract = "Thermoelectric power (TEP) of MgB2 and its changes with the superconducting transition temperature (Tc) have been investigated. MgB2 samples synthesized with different techniques - sample 1 by the encapsulation method and sample 2 by the high pressure and high temperature technique - showed different Tc (Tc of sample 1 = 38.7 K, and Tc of sample 2 = 40.4 K). The characteristic features of the TEP of these samples - low temperature linear behavior, deviation from the low temperature linear behavior at a certain temperature, and an almost saturating value at ∼300 K - were found to vary systematically with Tc, consistent with the previously reported TEP changes in Mg1-xAlxB2. These changes of the TEP behaviors with Tc in the superconducting diborides system are discussed in comparison with those of high Tc cuprates and bismuthates. The common feature of the saturating TEP at high temperatures suggests the importance of an anharmonic electron-phonon interaction. {\textcopyright} 2003 Elsevier Science B.V. All rights reserved.",

author = "Kim, \{D. C.\} and Kim, \{J. S.\} and Kim, \{B. H.\} and Park, \{Y. W.\} and Jung, \{C. U.\} and Lee, \{S. I.\}",

year = "2003",

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doi = "10.1016/S0921-4534(03)00626-9",

language = "English",

volume = "387",

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journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

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}

TY - JOUR

T1 - Thermoelectric power of MgB2

AU - Kim, D. C.

AU - Kim, J. S.

AU - Kim, B. H.

AU - Park, Y. W.

AU - Jung, C. U.

AU - Lee, S. I.

PY - 2003/5/15

Y1 - 2003/5/15

N2 - Thermoelectric power (TEP) of MgB2 and its changes with the superconducting transition temperature (Tc) have been investigated. MgB2 samples synthesized with different techniques - sample 1 by the encapsulation method and sample 2 by the high pressure and high temperature technique - showed different Tc (Tc of sample 1 = 38.7 K, and Tc of sample 2 = 40.4 K). The characteristic features of the TEP of these samples - low temperature linear behavior, deviation from the low temperature linear behavior at a certain temperature, and an almost saturating value at ∼300 K - were found to vary systematically with Tc, consistent with the previously reported TEP changes in Mg1-xAlxB2. These changes of the TEP behaviors with Tc in the superconducting diborides system are discussed in comparison with those of high Tc cuprates and bismuthates. The common feature of the saturating TEP at high temperatures suggests the importance of an anharmonic electron-phonon interaction. © 2003 Elsevier Science B.V. All rights reserved.

AB - Thermoelectric power (TEP) of MgB2 and its changes with the superconducting transition temperature (Tc) have been investigated. MgB2 samples synthesized with different techniques - sample 1 by the encapsulation method and sample 2 by the high pressure and high temperature technique - showed different Tc (Tc of sample 1 = 38.7 K, and Tc of sample 2 = 40.4 K). The characteristic features of the TEP of these samples - low temperature linear behavior, deviation from the low temperature linear behavior at a certain temperature, and an almost saturating value at ∼300 K - were found to vary systematically with Tc, consistent with the previously reported TEP changes in Mg1-xAlxB2. These changes of the TEP behaviors with Tc in the superconducting diborides system are discussed in comparison with those of high Tc cuprates and bismuthates. The common feature of the saturating TEP at high temperatures suggests the importance of an anharmonic electron-phonon interaction. © 2003 Elsevier Science B.V. All rights reserved.

UR - https://www.scopus.com/pages/publications/0037447735

U2 - 10.1016/S0921-4534(03)00626-9

DO - 10.1016/S0921-4534(03)00626-9

M3 - Article

SN - 0921-4534

VL - 387

SP - 313

EP - 320

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 3-4

ER -

Thermoelectric power of MgB2

Abstract

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