Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors

M. Zamboni; S. I. Yoo; T. Higuchi; K. Waki; S. Koishikawa; M. Murakami

doi:10.1016/S0921-5107(97)00324-3

Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors

M. Zamboni, S. I. Yoo, T. Higuchi, K. Waki, S. Koishikawa, M. Murakami

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

1 Citation (Scopus)

Abstract

The magnetic flux dynamics of Nd-Ba-Cu-O (NdBCO) bulk superconductors produced by the Oxygen-Controlled-Melt-Growth (OCMG) method has been investigated using the Magneto-Optical (M-O) technique at various low temperatures for an external magnetic field applied both parallel (H//c) and perpendicular (H⊥c) to the c-axis of the sample. While for H//c the flux motion was isotropic, for H⊥c anisotropic penetration and expulsion of the flux lines was observed directly. In the configuration H⊥c the flux lines were observed to move in and out the sample predominantly parallel to the a-b planes. The flux behaviour has also been correlated to the microstructure. Particularly, microcracks along the basal plane were found to provide a low resistance channel for flux motion.

Original language	English
Pages (from-to)	185-188
Number of pages	4
Journal	Materials Science and Engineering B
Volume	53
Issue number	1-2
DOIs	https://doi.org/10.1016/S0921-5107(97)00324-3
Publication status	Published - 1998 May 1
Externally published	Yes

Keywords

Anisotropy
Flux dynamics
Iron-garnet films
Magneto optical technique
Nd-Ba-Cu-O superconductors

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/S0921-5107(97)00324-3

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@article{ac94faae71b14697a1f8d815d2e84cf5,

title = "Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors",

abstract = "The magnetic flux dynamics of Nd-Ba-Cu-O (NdBCO) bulk superconductors produced by the Oxygen-Controlled-Melt-Growth (OCMG) method has been investigated using the Magneto-Optical (M-O) technique at various low temperatures for an external magnetic field applied both parallel (H//c) and perpendicular (H⊥c) to the c-axis of the sample. While for H//c the flux motion was isotropic, for H⊥c anisotropic penetration and expulsion of the flux lines was observed directly. In the configuration H⊥c the flux lines were observed to move in and out the sample predominantly parallel to the a-b planes. The flux behaviour has also been correlated to the microstructure. Particularly, microcracks along the basal plane were found to provide a low resistance channel for flux motion.",

keywords = "Anisotropy, Flux dynamics, Iron-garnet films, Magneto optical technique, Nd-Ba-Cu-O superconductors",

author = "M. Zamboni and Yoo, {S. I.} and T. Higuchi and K. Waki and S. Koishikawa and M. Murakami",

note = "Funding Information: This work was supported by NED0 of Industrial Science and Technology gram.",

year = "1998",

month = may,

day = "1",

doi = "10.1016/S0921-5107(97)00324-3",

language = "English",

volume = "53",

pages = "185--188",

journal = "Materials Science and Engineering B",

issn = "0921-5107",

publisher = "Elsevier BV",

number = "1-2",

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TY - JOUR

T1 - Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors

AU - Zamboni, M.

AU - Yoo, S. I.

AU - Higuchi, T.

AU - Waki, K.

AU - Koishikawa, S.

AU - Murakami, M.

N1 - Funding Information: This work was supported by NED0 of Industrial Science and Technology gram.

PY - 1998/5/1

Y1 - 1998/5/1

N2 - The magnetic flux dynamics of Nd-Ba-Cu-O (NdBCO) bulk superconductors produced by the Oxygen-Controlled-Melt-Growth (OCMG) method has been investigated using the Magneto-Optical (M-O) technique at various low temperatures for an external magnetic field applied both parallel (H//c) and perpendicular (H⊥c) to the c-axis of the sample. While for H//c the flux motion was isotropic, for H⊥c anisotropic penetration and expulsion of the flux lines was observed directly. In the configuration H⊥c the flux lines were observed to move in and out the sample predominantly parallel to the a-b planes. The flux behaviour has also been correlated to the microstructure. Particularly, microcracks along the basal plane were found to provide a low resistance channel for flux motion.

AB - The magnetic flux dynamics of Nd-Ba-Cu-O (NdBCO) bulk superconductors produced by the Oxygen-Controlled-Melt-Growth (OCMG) method has been investigated using the Magneto-Optical (M-O) technique at various low temperatures for an external magnetic field applied both parallel (H//c) and perpendicular (H⊥c) to the c-axis of the sample. While for H//c the flux motion was isotropic, for H⊥c anisotropic penetration and expulsion of the flux lines was observed directly. In the configuration H⊥c the flux lines were observed to move in and out the sample predominantly parallel to the a-b planes. The flux behaviour has also been correlated to the microstructure. Particularly, microcracks along the basal plane were found to provide a low resistance channel for flux motion.

KW - Anisotropy

KW - Flux dynamics

KW - Iron-garnet films

KW - Magneto optical technique

KW - Nd-Ba-Cu-O superconductors

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U2 - 10.1016/S0921-5107(97)00324-3

DO - 10.1016/S0921-5107(97)00324-3

M3 - Article

AN - SCOPUS:0042784523

SN - 0921-5107

VL - 53

SP - 185

EP - 188

JO - Materials Science and Engineering B

JF - Materials Science and Engineering B

IS - 1-2

ER -

Magneto optical observations of flux dynamics in Nd-Ba-Cu-O bulk superconductors

Abstract

Keywords

ASJC Scopus subject areas

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