Irreversibility field and c-axis correlated pinning in high- Jc SmBCO films

Satoshi Awaji; Masafumi Namba; Kazuo Watanabe; Masashi Miura; Yusuke Ichino; Yutaka Yoshida; Yoshiaki Takai; Kaname Matsumoto

doi:10.1109/TASC.2007.897949

Irreversibility field and c-axis correlated pinning in high- J_c SmBCO films

Satoshi Awaji, Masafumi Namba, Kazuo Watanabe, Masashi Miura, Yusuke Ichino, Yutaka Yoshida, Yoshiaki Takai, Kaname Matsumoto

High Field Laboratory for Superconducting Materials

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

2 Citations (Scopus)

Abstract

A high critical current density J_c at 77.3 K and a high irreversibility field for B ∥ c were achieved for low-temperature-growth processed SmBa₂Cu₃O₇ (LTG-Sm123) films. Transport properties of the LTG-Sm123 films with high J_c were measured in high magnetic fields up to 17 T. We found a small enhancement of the irreversibility field due to the c-axis correlated pinning. We also observed the large peak for B ∥ c in a low field region below 1 T and 77.3 K. Those behaviors are originated with the c-axis correlated pinning. The peak at B ∥ c decreases in a low field region but increases again above 3 T with increasing a magnetic field. These J_c behaviors are considerably related with the enhancement of irreversibility field. From experimental results obtained in this study, we proposed new pinned glass states near the irreversibility field.

Original language	English
Pages (from-to)	3656-3659
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	17
Issue number	2
DOIs	https://doi.org/10.1109/TASC.2007.897949
Publication status	Published - 2007 Jun

Keywords

Bose glass
Collective pinning
Critical current density
Irreversibility field

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/TASC.2007.897949

Cite this

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title = "Irreversibility field and c-axis correlated pinning in high- Jc SmBCO films",

abstract = "A high critical current density Jc at 77.3 K and a high irreversibility field for B ∥ c were achieved for low-temperature-growth processed SmBa2Cu3O7 (LTG-Sm123) films. Transport properties of the LTG-Sm123 films with high Jc were measured in high magnetic fields up to 17 T. We found a small enhancement of the irreversibility field due to the c-axis correlated pinning. We also observed the large peak for B ∥ c in a low field region below 1 T and 77.3 K. Those behaviors are originated with the c-axis correlated pinning. The peak at B ∥ c decreases in a low field region but increases again above 3 T with increasing a magnetic field. These Jc behaviors are considerably related with the enhancement of irreversibility field. From experimental results obtained in this study, we proposed new pinned glass states near the irreversibility field.",

keywords = "Bose glass, Collective pinning, Critical current density, Irreversibility field",

author = "Satoshi Awaji and Masafumi Namba and Kazuo Watanabe and Masashi Miura and Yusuke Ichino and Yutaka Yoshida and Yoshiaki Takai and Kaname Matsumoto",

year = "2007",

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doi = "10.1109/TASC.2007.897949",

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journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Irreversibility field and c-axis correlated pinning in high- Jc SmBCO films

AU - Awaji, Satoshi

AU - Namba, Masafumi

AU - Watanabe, Kazuo

AU - Miura, Masashi

AU - Ichino, Yusuke

AU - Yoshida, Yutaka

AU - Takai, Yoshiaki

AU - Matsumoto, Kaname

PY - 2007/6

Y1 - 2007/6

N2 - A high critical current density Jc at 77.3 K and a high irreversibility field for B ∥ c were achieved for low-temperature-growth processed SmBa2Cu3O7 (LTG-Sm123) films. Transport properties of the LTG-Sm123 films with high Jc were measured in high magnetic fields up to 17 T. We found a small enhancement of the irreversibility field due to the c-axis correlated pinning. We also observed the large peak for B ∥ c in a low field region below 1 T and 77.3 K. Those behaviors are originated with the c-axis correlated pinning. The peak at B ∥ c decreases in a low field region but increases again above 3 T with increasing a magnetic field. These Jc behaviors are considerably related with the enhancement of irreversibility field. From experimental results obtained in this study, we proposed new pinned glass states near the irreversibility field.

AB - A high critical current density Jc at 77.3 K and a high irreversibility field for B ∥ c were achieved for low-temperature-growth processed SmBa2Cu3O7 (LTG-Sm123) films. Transport properties of the LTG-Sm123 films with high Jc were measured in high magnetic fields up to 17 T. We found a small enhancement of the irreversibility field due to the c-axis correlated pinning. We also observed the large peak for B ∥ c in a low field region below 1 T and 77.3 K. Those behaviors are originated with the c-axis correlated pinning. The peak at B ∥ c decreases in a low field region but increases again above 3 T with increasing a magnetic field. These Jc behaviors are considerably related with the enhancement of irreversibility field. From experimental results obtained in this study, we proposed new pinned glass states near the irreversibility field.

KW - Bose glass

KW - Collective pinning

KW - Critical current density

KW - Irreversibility field

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