Superconducting fluctuation effects in grain-aligned HgBa2Ca2Cu3O8+δ

Myoung Kwang Bae; M. S. Choi; Sergey Lee; Sung Ik Lee; W. C. Lee

doi:10.1016/0921-4534(94)90629-7

Superconducting fluctuation effects in grain-aligned HgBa₂Ca₂Cu₃O_8+δ

Myoung Kwang Bae, M. S. Choi, Sergey Lee, Sung Ik Lee, W. C. Lee

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

8 Citations (Scopus)

Abstract

We have measured the normal state magnetization for grain-aligned HgBa₂Ca₂Cu₃O_8+δ with high and low magnetic fields applied perpendicular to the CuO₂ planes. The high-field magnetization curves follow the three-dimensional scaling based on the Ginzburg-Landau theory. In addition, we observed significant superconducting fluctuation diamagnetism above T_c using a low magnetic field, and analyzed it by utilizing the modified Lawrence-Doniach model. Our result demonstrates the dimensional crossover from 3D to 2D as the temperature increases, which is consistent with the scaling result of a high-field limit. From the analysis, we obtained the upper critical field slope, zero-temperature GL coherence length, and mass anisotropy.

Original language	English
Pages (from-to)	249-251
Number of pages	3
Journal	Physica C: Superconductivity and its Applications
Volume	231
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(94)90629-7
Publication status	Published - 1994 Oct 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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10.1016/0921-4534(94)90629-7

Cite this

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title = "Superconducting fluctuation effects in grain-aligned HgBa2Ca2Cu3O8+δ",

abstract = "We have measured the normal state magnetization for grain-aligned HgBa2Ca2Cu3O8+δ with high and low magnetic fields applied perpendicular to the CuO2 planes. The high-field magnetization curves follow the three-dimensional scaling based on the Ginzburg-Landau theory. In addition, we observed significant superconducting fluctuation diamagnetism above Tc using a low magnetic field, and analyzed it by utilizing the modified Lawrence-Doniach model. Our result demonstrates the dimensional crossover from 3D to 2D as the temperature increases, which is consistent with the scaling result of a high-field limit. From the analysis, we obtained the upper critical field slope, zero-temperature GL coherence length, and mass anisotropy.",

author = "Bae, {Myoung Kwang} and Choi, {M. S.} and Sergey Lee and Lee, {Sung Ik} and Lee, {W. C.}",

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T1 - Superconducting fluctuation effects in grain-aligned HgBa2Ca2Cu3O8+δ

AU - Bae, Myoung Kwang

AU - Choi, M. S.

AU - Lee, Sergey

AU - Lee, Sung Ik

AU - Lee, W. C.

PY - 1994/10/1

Y1 - 1994/10/1

N2 - We have measured the normal state magnetization for grain-aligned HgBa2Ca2Cu3O8+δ with high and low magnetic fields applied perpendicular to the CuO2 planes. The high-field magnetization curves follow the three-dimensional scaling based on the Ginzburg-Landau theory. In addition, we observed significant superconducting fluctuation diamagnetism above Tc using a low magnetic field, and analyzed it by utilizing the modified Lawrence-Doniach model. Our result demonstrates the dimensional crossover from 3D to 2D as the temperature increases, which is consistent with the scaling result of a high-field limit. From the analysis, we obtained the upper critical field slope, zero-temperature GL coherence length, and mass anisotropy.

AB - We have measured the normal state magnetization for grain-aligned HgBa2Ca2Cu3O8+δ with high and low magnetic fields applied perpendicular to the CuO2 planes. The high-field magnetization curves follow the three-dimensional scaling based on the Ginzburg-Landau theory. In addition, we observed significant superconducting fluctuation diamagnetism above Tc using a low magnetic field, and analyzed it by utilizing the modified Lawrence-Doniach model. Our result demonstrates the dimensional crossover from 3D to 2D as the temperature increases, which is consistent with the scaling result of a high-field limit. From the analysis, we obtained the upper critical field slope, zero-temperature GL coherence length, and mass anisotropy.

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Superconducting fluctuation effects in grain-aligned HgBa₂Ca₂Cu₃O_8+δ

Abstract

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