Vortex lock-in transition in Tl2Ba2CuO6 superconductor and vortex phase diagram

Gunadhor S. Okram; Haruyoshi Aoki; Ming Xu; David G. Hinks

doi:10.1016/S0921-4534(00)01773-1

Vortex lock-in transition in Tl₂Ba₂CuO₆ superconductor and vortex phase diagram

Gunadhor S. Okram, Haruyoshi Aoki, Ming Xu, David G. Hinks

Science

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

3 Citations (Scopus)

Abstract

Lock-in transition in good quality over-doped Tl₂Ba₂CuO₆ crystals has been investigated. As the c-axis angle θ with the magnetic field H approaches 90°, the flux flow resistivity ρ(θ) exhibits a sharp drop, a dip and a peak. These features were observed for a particular range of H and temperatures T and they have been assigned to the vortex phase transitions of different types. These enabled us to identify the associated vortex phase diagrams, viz. the θ-t and θ-H phase diagrams, where t is the reduced temperature T/T_c We made an attempt to fit the data with the available theories and to discuss the results.

Original language	English
Pages (from-to)	65-76
Number of pages	12
Journal	Physica C: Superconductivity and its applications
Volume	355
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-4534(00)01773-1
Publication status	Published - 2001 Jun 1

Keywords

Cu-O planes
Flux flow
Magneto-resistivity
Phase-diagram
TlBaCuOcrystal

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(00)01773-1

Cite this

@article{ee64f9b7aa134192927c128e65fef9aa,

title = "Vortex lock-in transition in Tl2Ba2CuO6 superconductor and vortex phase diagram",

abstract = "Lock-in transition in good quality over-doped Tl2Ba2CuO6 crystals has been investigated. As the c-axis angle θ with the magnetic field H approaches 90°, the flux flow resistivity ρ(θ) exhibits a sharp drop, a dip and a peak. These features were observed for a particular range of H and temperatures T and they have been assigned to the vortex phase transitions of different types. These enabled us to identify the associated vortex phase diagrams, viz. the θ-t and θ-H phase diagrams, where t is the reduced temperature T/Tc We made an attempt to fit the data with the available theories and to discuss the results.",

keywords = "Cu-O planes, Flux flow, Magneto-resistivity, Phase-diagram, TlBaCuOcrystal",

author = "Okram, {Gunadhor S.} and Haruyoshi Aoki and Ming Xu and Hinks, {David G.}",

note = "Funding Information: We thank Dr. S.K. Agarwal for reading the manuscript carefully. G.S.O. acknowledges with thanks the Science and Technology Agency (STA), Government of Japan for awarding STA fellowship and Council of Scientific and Industrial Research (CSIR), Government of India for awarding the Senior Research Associate-ship (Pool Scheme). The work was supported by the NSF through Science and Technology Center for Superconductivity under contract no. DMR 91-20000, the US Department of Energy under contracts nos. W-31-109-ENG-38 and W-7405-ENG-82.",

year = "2001",

month = jun,

day = "1",

doi = "10.1016/S0921-4534(00)01773-1",

language = "English",

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pages = "65--76",

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

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TY - JOUR

T1 - Vortex lock-in transition in Tl2Ba2CuO6 superconductor and vortex phase diagram

AU - Okram, Gunadhor S.

AU - Aoki, Haruyoshi

AU - Xu, Ming

AU - Hinks, David G.

N1 - Funding Information: We thank Dr. S.K. Agarwal for reading the manuscript carefully. G.S.O. acknowledges with thanks the Science and Technology Agency (STA), Government of Japan for awarding STA fellowship and Council of Scientific and Industrial Research (CSIR), Government of India for awarding the Senior Research Associate-ship (Pool Scheme). The work was supported by the NSF through Science and Technology Center for Superconductivity under contract no. DMR 91-20000, the US Department of Energy under contracts nos. W-31-109-ENG-38 and W-7405-ENG-82.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - Lock-in transition in good quality over-doped Tl2Ba2CuO6 crystals has been investigated. As the c-axis angle θ with the magnetic field H approaches 90°, the flux flow resistivity ρ(θ) exhibits a sharp drop, a dip and a peak. These features were observed for a particular range of H and temperatures T and they have been assigned to the vortex phase transitions of different types. These enabled us to identify the associated vortex phase diagrams, viz. the θ-t and θ-H phase diagrams, where t is the reduced temperature T/Tc We made an attempt to fit the data with the available theories and to discuss the results.

AB - Lock-in transition in good quality over-doped Tl2Ba2CuO6 crystals has been investigated. As the c-axis angle θ with the magnetic field H approaches 90°, the flux flow resistivity ρ(θ) exhibits a sharp drop, a dip and a peak. These features were observed for a particular range of H and temperatures T and they have been assigned to the vortex phase transitions of different types. These enabled us to identify the associated vortex phase diagrams, viz. the θ-t and θ-H phase diagrams, where t is the reduced temperature T/Tc We made an attempt to fit the data with the available theories and to discuss the results.

KW - Cu-O planes

KW - Flux flow

KW - Magneto-resistivity

KW - Phase-diagram

KW - TlBaCuOcrystal

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