Upper critical field in the Ba1-xKxBiO3 superconductor

P. Samuely; P. Szabó; A. G.M. Jansen; P. Wyder; T. Klein; J. Marcus; C. Escribe-Filippini

doi:10.1016/S0921-4534(97)01116-7

Upper critical field in the Ba_1-xK_xBiO₃ superconductor

P. Samuely, P. Szabó, A. G.M. Jansen, P. Wyder, T. Klein, J. Marcus, C. Escribe-Filippini

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

Abstract

We have performed simultaneously magnetotransport and magnetotunneling experiments on Ba_1-xK_xBiO₃ single crystals (T_c ∼ 23 K) in magnetic fields up to 30 Tesla (∼ H_c2(0)) to determine the upper critical field H_c2. A completely different modulus and temperature dependence of 'the critical fields' are obtained by the dissipative method (magnetoresistance) and the non-dissipative one (tunneling). While H_c2(T) from tunneling follows the BCS prediction, the magnetotransport data show rather a melting line in the field-versus-temperature H - T phase diagram of this 3D - superconductor. One can speculate that the same situation holds in high-T_c cuprates.

Original language	English
Pages (from-to)	2049-2050
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	282
Issue number	PART 4
DOIs	https://doi.org/10.1016/S0921-4534(97)01116-7
Publication status	Published - 1 Jan 1997
Externally published	Yes

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title = "Upper critical field in the Ba1-xKxBiO3 superconductor",

abstract = "We have performed simultaneously magnetotransport and magnetotunneling experiments on Ba1-xKxBiO3 single crystals (Tc ∼ 23 K) in magnetic fields up to 30 Tesla (∼ Hc2(0)) to determine the upper critical field Hc2. A completely different modulus and temperature dependence of 'the critical fields' are obtained by the dissipative method (magnetoresistance) and the non-dissipative one (tunneling). While Hc2(T) from tunneling follows the BCS prediction, the magnetotransport data show rather a melting line in the field-versus-temperature H - T phase diagram of this 3D - superconductor. One can speculate that the same situation holds in high-Tc cuprates.",

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T1 - Upper critical field in the Ba1-xKxBiO3 superconductor

AU - Samuely, P.

AU - Szabó, P.

AU - Jansen, A. G.M.

AU - Wyder, P.

AU - Klein, T.

AU - Marcus, J.

AU - Escribe-Filippini, C.

PY - 1997/1/1

Y1 - 1997/1/1

N2 - We have performed simultaneously magnetotransport and magnetotunneling experiments on Ba1-xKxBiO3 single crystals (Tc ∼ 23 K) in magnetic fields up to 30 Tesla (∼ Hc2(0)) to determine the upper critical field Hc2. A completely different modulus and temperature dependence of 'the critical fields' are obtained by the dissipative method (magnetoresistance) and the non-dissipative one (tunneling). While Hc2(T) from tunneling follows the BCS prediction, the magnetotransport data show rather a melting line in the field-versus-temperature H - T phase diagram of this 3D - superconductor. One can speculate that the same situation holds in high-Tc cuprates.

AB - We have performed simultaneously magnetotransport and magnetotunneling experiments on Ba1-xKxBiO3 single crystals (Tc ∼ 23 K) in magnetic fields up to 30 Tesla (∼ Hc2(0)) to determine the upper critical field Hc2. A completely different modulus and temperature dependence of 'the critical fields' are obtained by the dissipative method (magnetoresistance) and the non-dissipative one (tunneling). While Hc2(T) from tunneling follows the BCS prediction, the magnetotransport data show rather a melting line in the field-versus-temperature H - T phase diagram of this 3D - superconductor. One can speculate that the same situation holds in high-Tc cuprates.

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DO - 10.1016/S0921-4534(97)01116-7

M3 - Article

AN - SCOPUS:0031207495

SN - 0921-4534

VL - 282

SP - 2049

EP - 2050

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - PART 4

ER -

Upper critical field in the Ba1-xKxBiO3 superconductor

Abstract

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Upper critical field in the Ba_1-xK_xBiO₃ superconductor