Mean-field specific heat of CuGeO3

Y. K. Kuo; E. Figueroa; J. W. Brill

doi:10.1016/0038-1098(95)00090-9

Mean-field specific heat of CuGeO₃

Y. K. Kuo
, E. Figueroa
, J. W. Brill

Producción científica: Article › revisión exhaustiva

19 Citas (Scopus)

Resumen

We have measured the specific heat of CuGeO₃ using ac calorimetry. There is a sharp discontinuity at its spin-Peierls phase transition (T_c = 14 K); the magnitude of the jump is consistent with mean-field theory, and implies a nearest neighbor exchange interaction of 75 K. The ratio of the specific heat peak and temperature derivative of the magnetic susceptibility at T_c is consistent with the observed value of d²T_c dH², but this ratio and the activated behavior of c_P below the transition deviate from mean-field behavior.

Idioma original	English
Páginas (desde-hasta)	385-389
Número de páginas	5
Publicación	Solid State Communications
Volumen	94
N.º	5
DOI	https://doi.org/10.1016/0038-1098(95)00090-9
Estado	Published - may 1995

Nota bibliográfica

Funding Information:
AcknowledgmentW-e appreciateth e assistanceo f M.A. Lloyd and helpful commentso f J.M. Honig, J.C. Lasjauniasa, nd P. Monceau. This work wass ponsoredin part by the U.S. National Science Foundation, grants #EHR-910876a4n d DMR-9300507.

Financiación

AcknowledgmentW-e appreciateth e assistanceo f M.A. Lloyd and helpful commentso f J.M. Honig, J.C. Lasjauniasa, nd P. Monceau. This work wass ponsoredin part by the U.S. National Science Foundation, grants #EHR-910876a4n d DMR-9300507.

Financiadores	Número del financiador
National Science Foundation (NSF)	DMR-9300507, -910876

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/0038-1098(95)00090-9

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abstract = "We have measured the specific heat of CuGeO3 using ac calorimetry. There is a sharp discontinuity at its spin-Peierls phase transition (Tc = 14 K); the magnitude of the jump is consistent with mean-field theory, and implies a nearest neighbor exchange interaction of 75 K. The ratio of the specific heat peak and temperature derivative of the magnetic susceptibility at Tc is consistent with the observed value of d2Tc dH2, but this ratio and the activated behavior of cP below the transition deviate from mean-field behavior.",

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N2 - We have measured the specific heat of CuGeO3 using ac calorimetry. There is a sharp discontinuity at its spin-Peierls phase transition (Tc = 14 K); the magnitude of the jump is consistent with mean-field theory, and implies a nearest neighbor exchange interaction of 75 K. The ratio of the specific heat peak and temperature derivative of the magnetic susceptibility at Tc is consistent with the observed value of d2Tc dH2, but this ratio and the activated behavior of cP below the transition deviate from mean-field behavior.

AB - We have measured the specific heat of CuGeO3 using ac calorimetry. There is a sharp discontinuity at its spin-Peierls phase transition (Tc = 14 K); the magnitude of the jump is consistent with mean-field theory, and implies a nearest neighbor exchange interaction of 75 K. The ratio of the specific heat peak and temperature derivative of the magnetic susceptibility at Tc is consistent with the observed value of d2Tc dH2, but this ratio and the activated behavior of cP below the transition deviate from mean-field behavior.

KW - A. magnetically ordered materials

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