Vortex-glass transition and fishtail effect in the cubic (K,Ba)BiO3 superconductor

I. Joumard; T. Klein; P. Samuely; P. Szabo; A. G.M. Jansen; G. Pillion; H. Rakoto; J. M. Broto; J. Marcus

doi:10.1016/S0921-4534(99)00093-3

Vortex-glass transition and fishtail effect in the cubic (K,Ba)BiO₃ superconductor

I. Joumard, T. Klein, P. Samuely, P. Szabo, A. G.M. Jansen, G. Pillion, H. Rakoto, J. M. Broto, J. Marcus

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present the H-T phase diagram of the cubic (K,Ba)BiO₃ high T_c superconductor (T_c approx. 30 K). We show that the vortex solid melts into a liquid phase for T > T_g(H) through a second order phase transition which can be well described by the vortex-glass transition scaling laws down to the lowest temperatures. Moreover, as usually observed in other high T_c materials, the 'apparent' critical current deduced from the width of the magnetization loops present a non monotonic behavior (so-called 'fishtail effect'). The position of the peak is time-independent at low temperature but disappears for long waiting times above approx. T_c/2. This may be related to a sharp increase of the relaxation rate in the vicinity of the vortex-glass transition line.

Original language	English
Pages (from-to)	436-440
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	317-318
DOIs	https://doi.org/10.1016/S0921-4534(99)00093-3
Publication status	Published - 1 Jan 1999
Externally published	Yes
Event	Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors - Crete, Greece Duration: 26 Sept 1998 → 3 Oct 1998

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10.1016/S0921-4534(99)00093-3

Cite this

@article{87ad3e92edc94a758b4dd51944b4bc87,

title = "Vortex-glass transition and fishtail effect in the cubic (K,Ba)BiO3 superconductor",

abstract = "We present the H-T phase diagram of the cubic (K,Ba)BiO3 high Tc superconductor (Tc approx. 30 K). We show that the vortex solid melts into a liquid phase for T > Tg(H) through a second order phase transition which can be well described by the vortex-glass transition scaling laws down to the lowest temperatures. Moreover, as usually observed in other high Tc materials, the 'apparent' critical current deduced from the width of the magnetization loops present a non monotonic behavior (so-called 'fishtail effect'). The position of the peak is time-independent at low temperature but disappears for long waiting times above approx. Tc/2. This may be related to a sharp increase of the relaxation rate in the vicinity of the vortex-glass transition line.",

author = "I. Joumard and T. Klein and P. Samuely and P. Szabo and Jansen, \{A. G.M.\} and G. Pillion and H. Rakoto and Broto, \{J. M.\} and J. Marcus",

year = "1999",

month = jan,

day = "1",

doi = "10.1016/S0921-4534(99)00093-3",

language = "English",

volume = "317-318",

pages = "436--440",

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

issn = "0921-4534",

note = "Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors ; Conference date: 26-09-1998 Through 03-10-1998",

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TY - JOUR

T1 - Vortex-glass transition and fishtail effect in the cubic (K,Ba)BiO3 superconductor

AU - Joumard, I.

AU - Klein, T.

AU - Samuely, P.

AU - Szabo, P.

AU - Jansen, A. G.M.

AU - Pillion, G.

AU - Rakoto, H.

AU - Broto, J. M.

AU - Marcus, J.

PY - 1999/1/1

Y1 - 1999/1/1

N2 - We present the H-T phase diagram of the cubic (K,Ba)BiO3 high Tc superconductor (Tc approx. 30 K). We show that the vortex solid melts into a liquid phase for T > Tg(H) through a second order phase transition which can be well described by the vortex-glass transition scaling laws down to the lowest temperatures. Moreover, as usually observed in other high Tc materials, the 'apparent' critical current deduced from the width of the magnetization loops present a non monotonic behavior (so-called 'fishtail effect'). The position of the peak is time-independent at low temperature but disappears for long waiting times above approx. Tc/2. This may be related to a sharp increase of the relaxation rate in the vicinity of the vortex-glass transition line.

AB - We present the H-T phase diagram of the cubic (K,Ba)BiO3 high Tc superconductor (Tc approx. 30 K). We show that the vortex solid melts into a liquid phase for T > Tg(H) through a second order phase transition which can be well described by the vortex-glass transition scaling laws down to the lowest temperatures. Moreover, as usually observed in other high Tc materials, the 'apparent' critical current deduced from the width of the magnetization loops present a non monotonic behavior (so-called 'fishtail effect'). The position of the peak is time-independent at low temperature but disappears for long waiting times above approx. Tc/2. This may be related to a sharp increase of the relaxation rate in the vicinity of the vortex-glass transition line.

U2 - 10.1016/S0921-4534(99)00093-3

DO - 10.1016/S0921-4534(99)00093-3

M3 - Conference article

AN - SCOPUS:0033132451

SN - 0921-4534

VL - 317-318

SP - 436

EP - 440

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

T2 - Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors

Y2 - 26 September 1998 through 3 October 1998

ER -

Vortex-glass transition and fishtail effect in the cubic (K,Ba)BiO3 superconductor

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Vortex-glass transition and fishtail effect in the cubic (K,Ba)BiO₃ superconductor