Study of magnetic flux in a Bi2212 single crystal by torsional oscillation

H. Niimi; K. Inoue; S. Kawamata; K. Okuda

doi:10.1016/0921-4534(95)00788-1

Study of magnetic flux in a Bi2212 single crystal by torsional oscillation

H. Niimi, K. Inoue, S. Kawamata, K. Okuda

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

Abstract

The vortex state of a Bi₂Sr₂CaCu₂O_8+δ (Bi2212) single crystal was investigated by measuring the free torsional oscillation in magnetic field with special attention to the energy dissipation. The decay time and the oscillation period were measured at temperatures between 4.2 and 100 K under various fields up to 9 kOe. The temperature and field dependences of the energy dissipation due to flux depinning were obtained for the irreversible region. An abrupt increase of the energy dissipation was found around 1 kOe, suggesting the dimensional crossover from the 3D vortex solid to 2D pancakes with increasing field. A large damping anisotropy was also found and explained by a model of two-dimensional vortex pancakes.

Original language	English
Pages (from-to)	412-415
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	263
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4534(95)00788-1
Publication status	Published - 1996 May
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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10.1016/0921-4534(95)00788-1

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title = "Study of magnetic flux in a Bi2212 single crystal by torsional oscillation",

abstract = "The vortex state of a Bi2Sr2CaCu2O8+δ (Bi2212) single crystal was investigated by measuring the free torsional oscillation in magnetic field with special attention to the energy dissipation. The decay time and the oscillation period were measured at temperatures between 4.2 and 100 K under various fields up to 9 kOe. The temperature and field dependences of the energy dissipation due to flux depinning were obtained for the irreversible region. An abrupt increase of the energy dissipation was found around 1 kOe, suggesting the dimensional crossover from the 3D vortex solid to 2D pancakes with increasing field. A large damping anisotropy was also found and explained by a model of two-dimensional vortex pancakes.",

author = "H. Niimi and K. Inoue and S. Kawamata and K. Okuda",

year = "1996",

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doi = "10.1016/0921-4534(95)00788-1",

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T1 - Study of magnetic flux in a Bi2212 single crystal by torsional oscillation

AU - Niimi, H.

AU - Inoue, K.

AU - Kawamata, S.

AU - Okuda, K.

PY - 1996/5

Y1 - 1996/5

N2 - The vortex state of a Bi2Sr2CaCu2O8+δ (Bi2212) single crystal was investigated by measuring the free torsional oscillation in magnetic field with special attention to the energy dissipation. The decay time and the oscillation period were measured at temperatures between 4.2 and 100 K under various fields up to 9 kOe. The temperature and field dependences of the energy dissipation due to flux depinning were obtained for the irreversible region. An abrupt increase of the energy dissipation was found around 1 kOe, suggesting the dimensional crossover from the 3D vortex solid to 2D pancakes with increasing field. A large damping anisotropy was also found and explained by a model of two-dimensional vortex pancakes.

AB - The vortex state of a Bi2Sr2CaCu2O8+δ (Bi2212) single crystal was investigated by measuring the free torsional oscillation in magnetic field with special attention to the energy dissipation. The decay time and the oscillation period were measured at temperatures between 4.2 and 100 K under various fields up to 9 kOe. The temperature and field dependences of the energy dissipation due to flux depinning were obtained for the irreversible region. An abrupt increase of the energy dissipation was found around 1 kOe, suggesting the dimensional crossover from the 3D vortex solid to 2D pancakes with increasing field. A large damping anisotropy was also found and explained by a model of two-dimensional vortex pancakes.

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JO - Physica C: Superconductivity and its Applications

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Study of magnetic flux in a Bi2212 single crystal by torsional oscillation

Abstract

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