Specific heat of single-crystal YNi2B2C and TmNi2B2C superconductors

R. Movshovich; M. F. Hundley; J. D. Thompson; P. C. Canfield; B. K. Cho; A. V. Chubukov

doi:10.1016/0921-4534(94)90097-3

Specific heat of single-crystal YNi₂B₂C and TmNi₂B₂C superconductors

R. Movshovich, M. F. Hundley, J. D. Thompson, P. C. Canfield, B. K. Cho, A. V. Chubukov

Physics and Astronomy (Twin Cities)

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

130 Scopus citations

Abstract

We have measured the specific heat of single crystals of superconducting YNi₂B₂C and TmNi₂B₂C. Analysis of YNi₂B₂C data in zero and 5 T magnetic fields indicates modestly strong electron-phonon coupling and a superconducting energy gap Δ(O) = 29 K. Superconductivity coexists with antiferromagnetic order below 1.5 K in TmNi₂B₂C. An interpretation of very low temperature specific heat indicates substantial magnetic anisotropy, with ferromagnetic planes weakly coupled antiferromagnetically to each other. Two-dimensional ferromagnetic spin waves produce a large linear-in-temperature contribution to the specific heat. We find no compelling evidence for an unconventional pairing mechanism in these systems.

Original language	English (US)
Pages (from-to)	381-386
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	227
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(94)90097-3
State	Published - Jul 1 1994

Bibliographical note

Funding Information:
Work at Los Alamos was performed under the auspices of the U.S. Department of Energy. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. W-7405-ENG-82 and work there was supported by the Director of Energy Research, Office of Basic Energy Sciences. We thank A. Balatsky and Z. Fisk for useful discussions.

Publisher link

10.1016/0921-4534(94)90097-3

Find It

Find It at U of M Libraries

Cite this

@article{cd1dd9c8844c4acabde58be3462dad2b,

title = "Specific heat of single-crystal YNi2B2C and TmNi2B2C superconductors",

abstract = "We have measured the specific heat of single crystals of superconducting YNi2B2C and TmNi2B2C. Analysis of YNi2B2C data in zero and 5 T magnetic fields indicates modestly strong electron-phonon coupling and a superconducting energy gap Δ(O) = 29 K. Superconductivity coexists with antiferromagnetic order below 1.5 K in TmNi2B2C. An interpretation of very low temperature specific heat indicates substantial magnetic anisotropy, with ferromagnetic planes weakly coupled antiferromagnetically to each other. Two-dimensional ferromagnetic spin waves produce a large linear-in-temperature contribution to the specific heat. We find no compelling evidence for an unconventional pairing mechanism in these systems.",

author = "R. Movshovich and Hundley, {M. F.} and Thompson, {J. D.} and Canfield, {P. C.} and Cho, {B. K.} and Chubukov, {A. V.}",

note = "Funding Information: Work at Los Alamos was performed under the auspices of the U.S. Department of Energy. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. W-7405-ENG-82 and work there was supported by the Director of Energy Research, Office of Basic Energy Sciences. We thank A. Balatsky and Z. Fisk for useful discussions.",

year = "1994",

month = jul,

day = "1",

doi = "10.1016/0921-4534(94)90097-3",

language = "English (US)",

volume = "227",

pages = "381--386",

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

issn = "0921-4534",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Specific heat of single-crystal YNi2B2C and TmNi2B2C superconductors

AU - Movshovich, R.

AU - Hundley, M. F.

AU - Thompson, J. D.

AU - Canfield, P. C.

AU - Cho, B. K.

AU - Chubukov, A. V.

N1 - Funding Information: Work at Los Alamos was performed under the auspices of the U.S. Department of Energy. Ames Laboratory is operated for the U.S. Department of Energy by Iowa State University under Contract No. W-7405-ENG-82 and work there was supported by the Director of Energy Research, Office of Basic Energy Sciences. We thank A. Balatsky and Z. Fisk for useful discussions.

PY - 1994/7/1

Y1 - 1994/7/1

N2 - We have measured the specific heat of single crystals of superconducting YNi2B2C and TmNi2B2C. Analysis of YNi2B2C data in zero and 5 T magnetic fields indicates modestly strong electron-phonon coupling and a superconducting energy gap Δ(O) = 29 K. Superconductivity coexists with antiferromagnetic order below 1.5 K in TmNi2B2C. An interpretation of very low temperature specific heat indicates substantial magnetic anisotropy, with ferromagnetic planes weakly coupled antiferromagnetically to each other. Two-dimensional ferromagnetic spin waves produce a large linear-in-temperature contribution to the specific heat. We find no compelling evidence for an unconventional pairing mechanism in these systems.

AB - We have measured the specific heat of single crystals of superconducting YNi2B2C and TmNi2B2C. Analysis of YNi2B2C data in zero and 5 T magnetic fields indicates modestly strong electron-phonon coupling and a superconducting energy gap Δ(O) = 29 K. Superconductivity coexists with antiferromagnetic order below 1.5 K in TmNi2B2C. An interpretation of very low temperature specific heat indicates substantial magnetic anisotropy, with ferromagnetic planes weakly coupled antiferromagnetically to each other. Two-dimensional ferromagnetic spin waves produce a large linear-in-temperature contribution to the specific heat. We find no compelling evidence for an unconventional pairing mechanism in these systems.

UR - http://www.scopus.com/inward/record.url?scp=0028464139&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028464139&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(94)90097-3

DO - 10.1016/0921-4534(94)90097-3

M3 - Article

AN - SCOPUS:0028464139

SN - 0921-4534

VL - 227

SP - 381

EP - 386

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 3-4

ER -