Magneto-optical investigation of "supercooled" disordered vortex states in Bi2Sr2CaCu2O8+δ

B. Kalisky; A. Shaulov; Y. Yeshurun

doi:10.1016/s0921-4534(02)02473-5

Magneto-optical investigation of "supercooled" disordered vortex states in Bi₂Sr₂CaCu₂O_8+δ

B. Kalisky, A. Shaulov, Y. Yeshurun

Department of Physics

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

2 Scopus citations

Abstract

Magnetic induction profiles across the width of a Bi₂Sr₂CaCu₂O_8+δ crystal were measured while the external magnetic field was ramped down from above the vortex solid-solid phase transition field down to zero. These profiles indicate dynamic coexistence of two vortex phases: a disordered phase in the sample interior and a quasi-ordered phase near the sample edges. The border between these two phases, marked by an abrupt change in the slope of the profiles, progresses towards the sample center and appears at the same induction, B_f, independent of the location. By increasing the sweep rate of the external field, B_f can be monotonically decreased to values well below the transition field. These results emphasize the role of the electric field in the vortex solid-solid phase transition, and question the interpretation of such "supercooling" experiments as signifying the first order nature of this transition.

Original language	English
Pages (from-to)	695-696
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	388-389
DOIs	https://doi.org/10.1016/s0921-4534(02)02473-5
State	Published - May 2003
Event	Proceedings of the 23rd international conference on low temper - Hiroshima, Japan Duration: 20 Aug 2002 → 27 Aug 2002

Bibliographical note

Funding Information:
This manuscript is part of B.K. Ph.D. thesis. A.S. acknowledges support from the Israel Science Foundation. This research is supported by The Israel Science Foundation––Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductors. We thank T. Tamegai for providing us with the Bi 2 Sr 2 CaCu 2 O 8+δ crystals.

Funding

This manuscript is part of B.K. Ph.D. thesis. A.S. acknowledges support from the Israel Science Foundation. This research is supported by The Israel Science Foundation––Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductors. We thank T. Tamegai for providing us with the Bi 2 Sr 2 CaCu 2 O 8+δ crystals.

Funders	Funder number
Heinrich Hertz Minerva Center
Israel Science Foundation

Keywords

BiSrCaCuO
Magneto-optics
Vortex phase transitions
Vortex states

Access to Document

10.1016/s0921-4534(02)02473-5

Cite this

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title = "Magneto-optical investigation of {"}supercooled{"} disordered vortex states in Bi2Sr2CaCu2O8+δ",

abstract = "Magnetic induction profiles across the width of a Bi2Sr2CaCu2O8+δ crystal were measured while the external magnetic field was ramped down from above the vortex solid-solid phase transition field down to zero. These profiles indicate dynamic coexistence of two vortex phases: a disordered phase in the sample interior and a quasi-ordered phase near the sample edges. The border between these two phases, marked by an abrupt change in the slope of the profiles, progresses towards the sample center and appears at the same induction, Bf, independent of the location. By increasing the sweep rate of the external field, Bf can be monotonically decreased to values well below the transition field. These results emphasize the role of the electric field in the vortex solid-solid phase transition, and question the interpretation of such {"}supercooling{"} experiments as signifying the first order nature of this transition.",

keywords = "BiSrCaCuO, Magneto-optics, Vortex phase transitions, Vortex states",

author = "B. Kalisky and A. Shaulov and Y. Yeshurun",

note = "Funding Information: This manuscript is part of B.K. Ph.D. thesis. A.S. acknowledges support from the Israel Science Foundation. This research is supported by The Israel Science Foundation––Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductors. We thank T. Tamegai for providing us with the Bi 2 Sr 2 CaCu 2 O 8+δ crystals.; Proceedings of the 23rd international conference on low temper ; Conference date: 20-08-2002 Through 27-08-2002",

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AU - Yeshurun, Y.

N1 - Funding Information: This manuscript is part of B.K. Ph.D. thesis. A.S. acknowledges support from the Israel Science Foundation. This research is supported by The Israel Science Foundation––Center of Excellence Program, and by the Heinrich Hertz Minerva Center for High Temperature Superconductors. We thank T. Tamegai for providing us with the Bi 2 Sr 2 CaCu 2 O 8+δ crystals.

PY - 2003/5

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N2 - Magnetic induction profiles across the width of a Bi2Sr2CaCu2O8+δ crystal were measured while the external magnetic field was ramped down from above the vortex solid-solid phase transition field down to zero. These profiles indicate dynamic coexistence of two vortex phases: a disordered phase in the sample interior and a quasi-ordered phase near the sample edges. The border between these two phases, marked by an abrupt change in the slope of the profiles, progresses towards the sample center and appears at the same induction, Bf, independent of the location. By increasing the sweep rate of the external field, Bf can be monotonically decreased to values well below the transition field. These results emphasize the role of the electric field in the vortex solid-solid phase transition, and question the interpretation of such "supercooling" experiments as signifying the first order nature of this transition.

AB - Magnetic induction profiles across the width of a Bi2Sr2CaCu2O8+δ crystal were measured while the external magnetic field was ramped down from above the vortex solid-solid phase transition field down to zero. These profiles indicate dynamic coexistence of two vortex phases: a disordered phase in the sample interior and a quasi-ordered phase near the sample edges. The border between these two phases, marked by an abrupt change in the slope of the profiles, progresses towards the sample center and appears at the same induction, Bf, independent of the location. By increasing the sweep rate of the external field, Bf can be monotonically decreased to values well below the transition field. These results emphasize the role of the electric field in the vortex solid-solid phase transition, and question the interpretation of such "supercooling" experiments as signifying the first order nature of this transition.

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