Subgrain structures and their effects on critical current properties in large single-domain RE123 bulk superconductors

K. Ogasawara; N. Sakai; M. Murakami

doi:10.1016/S0921-4534(02)01530-7

Subgrain structures and their effects on critical current properties in large single-domain RE123 bulk superconductors

K. Ogasawara, N. Sakai, M. Murakami

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

6 Citations (Scopus)

Abstract

We have studied the microstructures of subgrains in large single-domain RE123 (RE = Y, Sm) bulk superconductors through microscopic observation and X-ray pole figure analyses. We have found that misorientation of the subgrains increases along with the crystal growth, and also that the misorientation has positive relation to the size and concentration of the second-phase particles. Such subgrains are considered to affect current carrying capabilities in bulk materials, so that we performed magnetic and electric measurements for several samples having different subgrain structures. The relationships between obtained J_c-B or AC transport characteristics and subgrain geometries are discussed.

Original language	English
Pages (from-to)	727-731
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	378-381
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)01530-7
Publication status	Published - 2002 Oct 1
Externally published	Yes

Keywords

Magnetization
Microscopy
REBCO
Subgrain

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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AU - Sakai, N.

AU - Murakami, M.

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AB - We have studied the microstructures of subgrains in large single-domain RE123 (RE = Y, Sm) bulk superconductors through microscopic observation and X-ray pole figure analyses. We have found that misorientation of the subgrains increases along with the crystal growth, and also that the misorientation has positive relation to the size and concentration of the second-phase particles. Such subgrains are considered to affect current carrying capabilities in bulk materials, so that we performed magnetic and electric measurements for several samples having different subgrain structures. The relationships between obtained Jc-B or AC transport characteristics and subgrain geometries are discussed.

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KW - Microscopy

KW - REBCO

KW - Subgrain

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