Anisotropy in MgB2 thin film studied by magnetic field dependent complex microwave conductivity

A. Dulčić; M. Požek; D. Paar; E. M. Choi; H. J. Kim; W. N. Kang; S. I. Lee

doi:10.1016/j.physc.2004.03.101

Anisotropy in MgB₂ thin film studied by magnetic field dependent complex microwave conductivity

A. Dulčić
, M. Požek
, D. Paar
, E. M. Choi
, H. J. Kim
, W. N. Kang
, S. I. Lee

University of Zagreb
Pohang University of Science and Technology

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

1 Scopus citations

Abstract

Field and temperature dependent microwave measurements on high quality MgB₂ thin film have been performed. From the complex microwave conductivity one can identify the mean-field (MF) coherence length deeply in the mixed state, and the Ginzburg-Landau (GL) coherence length at the transition to the normal state. The analysis reveals the temperature independent anisotropy ratio ξ_MF^ab/ξ_MF^c≈2, and ξ_GL^ab/ξ_GL^c≈2.8. The analysis of depinning frequencies shows collective pinning behavior.

Original language	English
Pages (from-to)	662-663
Number of pages	2
Journal	Physica C: Superconductivity and its Applications
Volume	408-410
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physc.2004.03.101
State	Published - Aug 2004
Externally published	Yes
Event	Proceedings of the International Conference on Materials - Rio de Janeiro, Brazil Duration: 25 May 2003 → 30 May 2003

Keywords

Depinning
Fluctuations
MgB film
Microwave response
Mixed state

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10.1016/j.physc.2004.03.101

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title = "Anisotropy in MgB2 thin film studied by magnetic field dependent complex microwave conductivity",

abstract = "Field and temperature dependent microwave measurements on high quality MgB2 thin film have been performed. From the complex microwave conductivity one can identify the mean-field (MF) coherence length deeply in the mixed state, and the Ginzburg-Landau (GL) coherence length at the transition to the normal state. The analysis reveals the temperature independent anisotropy ratio ξMFab/ξMFc≈2, and ξGLab/ξGLc≈2.8. The analysis of depinning frequencies shows collective pinning behavior.",

keywords = "Depinning, Fluctuations, MgB film, Microwave response, Mixed state",

author = "A. Dul{\v c}i{\'c} and M. Po{\v z}ek and D. Paar and Choi, \{E. M.\} and Kim, \{H. J.\} and Kang, \{W. N.\} and Lee, \{S. I.\}",

year = "2004",

month = aug,

doi = "10.1016/j.physc.2004.03.101",

language = "English",

volume = "408-410",

pages = "662--663",

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

issn = "0921-4534",

publisher = "Elsevier B.V.",

number = "1-4",

note = "Proceedings of the International Conference on Materials ; Conference date: 25-05-2003 Through 30-05-2003",

}

TY - JOUR

T1 - Anisotropy in MgB2 thin film studied by magnetic field dependent complex microwave conductivity

AU - Dulčić, A.

AU - Požek, M.

AU - Paar, D.

AU - Choi, E. M.

AU - Kim, H. J.

AU - Kang, W. N.

AU - Lee, S. I.

PY - 2004/8

Y1 - 2004/8

N2 - Field and temperature dependent microwave measurements on high quality MgB2 thin film have been performed. From the complex microwave conductivity one can identify the mean-field (MF) coherence length deeply in the mixed state, and the Ginzburg-Landau (GL) coherence length at the transition to the normal state. The analysis reveals the temperature independent anisotropy ratio ξMFab/ξMFc≈2, and ξGLab/ξGLc≈2.8. The analysis of depinning frequencies shows collective pinning behavior.

AB - Field and temperature dependent microwave measurements on high quality MgB2 thin film have been performed. From the complex microwave conductivity one can identify the mean-field (MF) coherence length deeply in the mixed state, and the Ginzburg-Landau (GL) coherence length at the transition to the normal state. The analysis reveals the temperature independent anisotropy ratio ξMFab/ξMFc≈2, and ξGLab/ξGLc≈2.8. The analysis of depinning frequencies shows collective pinning behavior.

KW - Depinning

KW - Fluctuations

KW - MgB film

KW - Microwave response

KW - Mixed state

UR - https://www.scopus.com/pages/publications/4444223954

U2 - 10.1016/j.physc.2004.03.101

DO - 10.1016/j.physc.2004.03.101

M3 - Conference article

AN - SCOPUS:4444223954

SN - 0921-4534

VL - 408-410

SP - 662

EP - 663

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 1-4

T2 - Proceedings of the International Conference on Materials

Y2 - 25 May 2003 through 30 May 2003

ER -

Anisotropy in MgB₂ thin film studied by magnetic field dependent complex microwave conductivity

Abstract

Keywords

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