The specific heat of Ba0.6K0.4BiO3 below 2K

N. E. Hussey; J. P. Wakelin; D. F. Brewer; T. E. Hargreaves; C. S. McMenamin; A. L. Thomson; K. Prassides

doi:10.1016/0921-4526(94)91486-9

The specific heat of Ba_0.6K_0.4BiO₃ below 2K

N. E. Hussey, J. P. Wakelin, D. F. Brewer, T. E. Hargreaves, C. S. McMenamin, A. L. Thomson, K. Prassides

Advanced Institute for Materials Research (AIMR)

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

Abstract

We have measured the specific heat C of a polycrystalline sample of the non-cuprate superconductor Ba_0.6K_0.4BiO₃ (T_c ≈ 27K) from T = 1.8K down to T = 0.1K. The data could be fitted accurately to the expression C = AT^-2 + αTⁿ + βT³ where n = 0.53 ± 0.10. The nuclear term (AT^-2) is attributed to the presence of a crystalline electric field gradient on the Bi nuclei. The residual specific heat term (αTⁿ) has also been observed in the low temperature specific heat of several cuprate high-T_c superconductors (0.3 ≤ n ≤ 1) suggesting a possible common origin in all of these systems.

Original language	English
Pages (from-to)	1973-1974
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	194-196
Issue number	PART 2
DOIs	https://doi.org/10.1016/0921-4526(94)91486-9
Publication status	Published - 1994 Feb 2

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(94)91486-9

Cite this

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title = "The specific heat of Ba0.6K0.4BiO3 below 2K",

abstract = "We have measured the specific heat C of a polycrystalline sample of the non-cuprate superconductor Ba0.6K0.4BiO3 (Tc ≈ 27K) from T = 1.8K down to T = 0.1K. The data could be fitted accurately to the expression C = AT-2 + αTn + βT3 where n = 0.53 ± 0.10. The nuclear term (AT-2) is attributed to the presence of a crystalline electric field gradient on the Bi nuclei. The residual specific heat term (αTn) has also been observed in the low temperature specific heat of several cuprate high-Tc superconductors (0.3 ≤ n ≤ 1) suggesting a possible common origin in all of these systems.",

author = "Hussey, {N. E.} and Wakelin, {J. P.} and Brewer, {D. F.} and Hargreaves, {T. E.} and McMenamin, {C. S.} and Thomson, {A. L.} and K. Prassides",

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T1 - The specific heat of Ba0.6K0.4BiO3 below 2K

AU - Hussey, N. E.

AU - Wakelin, J. P.

AU - Brewer, D. F.

AU - Hargreaves, T. E.

AU - McMenamin, C. S.

AU - Thomson, A. L.

AU - Prassides, K.

PY - 1994/2/2

Y1 - 1994/2/2

N2 - We have measured the specific heat C of a polycrystalline sample of the non-cuprate superconductor Ba0.6K0.4BiO3 (Tc ≈ 27K) from T = 1.8K down to T = 0.1K. The data could be fitted accurately to the expression C = AT-2 + αTn + βT3 where n = 0.53 ± 0.10. The nuclear term (AT-2) is attributed to the presence of a crystalline electric field gradient on the Bi nuclei. The residual specific heat term (αTn) has also been observed in the low temperature specific heat of several cuprate high-Tc superconductors (0.3 ≤ n ≤ 1) suggesting a possible common origin in all of these systems.

AB - We have measured the specific heat C of a polycrystalline sample of the non-cuprate superconductor Ba0.6K0.4BiO3 (Tc ≈ 27K) from T = 1.8K down to T = 0.1K. The data could be fitted accurately to the expression C = AT-2 + αTn + βT3 where n = 0.53 ± 0.10. The nuclear term (AT-2) is attributed to the presence of a crystalline electric field gradient on the Bi nuclei. The residual specific heat term (αTn) has also been observed in the low temperature specific heat of several cuprate high-Tc superconductors (0.3 ≤ n ≤ 1) suggesting a possible common origin in all of these systems.

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IS - PART 2

ER -

The specific heat of Ba_0.6K_0.4BiO₃ below 2K

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