Observation of nucleation and annihilation of flux-lines with opposite sign in high-Tc superconductors

Th Schuster; M. R. Koblischka; N. Moser; H. Kronmüller

doi:10.1016/0921-4534(91)92171-7

Observation of nucleation and annihilation of flux-lines with opposite sign in high-T_c superconductors

Th Schuster, M. R. Koblischka, N. Moser, H. Kronmüller

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

26 Citations (Scopus)

Abstract

Using the high-resolution Faraday effect (HRF), we observed nucleation of domains in high-T_c single crystals consisting of flux-lines with opposite signs while reducing the applied external magnetic field to zero. This nucleation of domains with reversed flux-lines is found in YBa₂Cu₃O_7-δ single crystals as well as in Bi₂Sr₂CaCu₂O_7-δ single crystals. The resulting domain pattern in the remanent state is then composed of domains with opposite polarity which are seperated by an annihilation zone. An experimental proof for the existence of opposite signs of the vortices has been given by observing the behaviour of the domains on the direction of the applied external magnetic field. We also show the dependence of the width of the annihilation zone on the external magnetic field, indicating the role of the pinning forces on this behaviour.

Original language	English
Pages (from-to)	269-278
Number of pages	10
Journal	Physica C: Superconductivity and its applications
Volume	179
Issue number	4-6
DOIs	https://doi.org/10.1016/0921-4534(91)92171-7
Publication status	Published - 1991 Sep 1
Externally published	Yes

ASJC Scopus subject areas

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

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title = "Observation of nucleation and annihilation of flux-lines with opposite sign in high-Tc superconductors",

abstract = "Using the high-resolution Faraday effect (HRF), we observed nucleation of domains in high-Tc single crystals consisting of flux-lines with opposite signs while reducing the applied external magnetic field to zero. This nucleation of domains with reversed flux-lines is found in YBa2Cu3O7-δ single crystals as well as in Bi2Sr2CaCu2O7-δ single crystals. The resulting domain pattern in the remanent state is then composed of domains with opposite polarity which are seperated by an annihilation zone. An experimental proof for the existence of opposite signs of the vortices has been given by observing the behaviour of the domains on the direction of the applied external magnetic field. We also show the dependence of the width of the annihilation zone on the external magnetic field, indicating the role of the pinning forces on this behaviour.",

author = "Th Schuster and Koblischka, {M. R.} and N. Moser and H. Kronm{\"u}ller",

note = "Funding Information: We acknowledge valuable discussions with U. EBmann and R.P. Hiibener. We wish also to thank G. Giintherodt for the BiSrCaCuO single crystals, P. Keppler for coating the samples with the magnetooptical active thin films and B. Ludescher for technical support. This work was financially supported by the Bun-desminister f'tir Forschung und Technologie (Project No. 13 N 57005). This is gratefully acknowledged.",

year = "1991",

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doi = "10.1016/0921-4534(91)92171-7",

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AU - Schuster, Th

AU - Koblischka, M. R.

AU - Moser, N.

AU - Kronmüller, H.

N1 - Funding Information: We acknowledge valuable discussions with U. EBmann and R.P. Hiibener. We wish also to thank G. Giintherodt for the BiSrCaCuO single crystals, P. Keppler for coating the samples with the magnetooptical active thin films and B. Ludescher for technical support. This work was financially supported by the Bun-desminister f'tir Forschung und Technologie (Project No. 13 N 57005). This is gratefully acknowledged.

PY - 1991/9/1

Y1 - 1991/9/1

N2 - Using the high-resolution Faraday effect (HRF), we observed nucleation of domains in high-Tc single crystals consisting of flux-lines with opposite signs while reducing the applied external magnetic field to zero. This nucleation of domains with reversed flux-lines is found in YBa2Cu3O7-δ single crystals as well as in Bi2Sr2CaCu2O7-δ single crystals. The resulting domain pattern in the remanent state is then composed of domains with opposite polarity which are seperated by an annihilation zone. An experimental proof for the existence of opposite signs of the vortices has been given by observing the behaviour of the domains on the direction of the applied external magnetic field. We also show the dependence of the width of the annihilation zone on the external magnetic field, indicating the role of the pinning forces on this behaviour.

AB - Using the high-resolution Faraday effect (HRF), we observed nucleation of domains in high-Tc single crystals consisting of flux-lines with opposite signs while reducing the applied external magnetic field to zero. This nucleation of domains with reversed flux-lines is found in YBa2Cu3O7-δ single crystals as well as in Bi2Sr2CaCu2O7-δ single crystals. The resulting domain pattern in the remanent state is then composed of domains with opposite polarity which are seperated by an annihilation zone. An experimental proof for the existence of opposite signs of the vortices has been given by observing the behaviour of the domains on the direction of the applied external magnetic field. We also show the dependence of the width of the annihilation zone on the external magnetic field, indicating the role of the pinning forces on this behaviour.

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