Temperature rise in an Sm-based bulk superconductor after applying iterative pulse fields

Hiroyuki Fujishiro; Kazuya Yokoyama; Tetsuo Oka; Koshichi Noto

doi:10.1088/0953-2048/17/1/009

Temperature rise in an Sm-based bulk superconductor after applying iterative pulse fields

Hiroyuki Fujishiro, Kazuya Yokoyama, Tetsuo Oka, Koshichi Noto

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

28 Citations (Scopus)

Abstract

The time evolutions and spatial distributions of temperature rise ΔT(t) have been measured on the surface of a cryo-cooled SmBaCuO bulk superconductor after iterative pulse field magnetizing with the same amplitude. For the applied pulse field B_ex ≤ 4.64 T, the maximum temperature rise ΔT_max monotonically decreases and approaches a steady ΔT(t) behaviour with an increasing number of times of pulse applications. On the other hand, for B_ex = 5.42 T, ΔT_max keeps on increasing after the third pulse application in a specific growth sector region and a clear anisotropic ΔT (t) behaviour has been found. The magnetic fluxes preferentially enter and leave the bulk superconductor through this sector region. The ΔT(t) behaviours are closely correlated with the distribution of the trapped field B_T^P and can be understood on the basis of the heat generation caused by the flux motion.

Original language	English
Pages (from-to)	51-57
Number of pages	7
Journal	Superconductor Science and Technology
Volume	17
Issue number	1
DOIs	https://doi.org/10.1088/0953-2048/17/1/009
Publication status	Published - 2004 Jan
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

Access to Document

10.1088/0953-2048/17/1/009

Cite this

@article{32facf80ea6646b6abc54fe97055fd10,

title = "Temperature rise in an Sm-based bulk superconductor after applying iterative pulse fields",

abstract = "The time evolutions and spatial distributions of temperature rise ΔT(t) have been measured on the surface of a cryo-cooled SmBaCuO bulk superconductor after iterative pulse field magnetizing with the same amplitude. For the applied pulse field Bex ≤ 4.64 T, the maximum temperature rise ΔTmax monotonically decreases and approaches a steady ΔT(t) behaviour with an increasing number of times of pulse applications. On the other hand, for Bex = 5.42 T, ΔTmax keeps on increasing after the third pulse application in a specific growth sector region and a clear anisotropic ΔT (t) behaviour has been found. The magnetic fluxes preferentially enter and leave the bulk superconductor through this sector region. The ΔT(t) behaviours are closely correlated with the distribution of the trapped field BTP and can be understood on the basis of the heat generation caused by the flux motion.",

author = "Hiroyuki Fujishiro and Kazuya Yokoyama and Tetsuo Oka and Koshichi Noto",

year = "2004",

month = jan,

doi = "10.1088/0953-2048/17/1/009",

language = "English",

volume = "17",

pages = "51--57",

journal = "Superconductor Science and Technology",

issn = "0953-2048",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - Temperature rise in an Sm-based bulk superconductor after applying iterative pulse fields

AU - Fujishiro, Hiroyuki

AU - Yokoyama, Kazuya

AU - Oka, Tetsuo

AU - Noto, Koshichi

PY - 2004/1

Y1 - 2004/1

N2 - The time evolutions and spatial distributions of temperature rise ΔT(t) have been measured on the surface of a cryo-cooled SmBaCuO bulk superconductor after iterative pulse field magnetizing with the same amplitude. For the applied pulse field Bex ≤ 4.64 T, the maximum temperature rise ΔTmax monotonically decreases and approaches a steady ΔT(t) behaviour with an increasing number of times of pulse applications. On the other hand, for Bex = 5.42 T, ΔTmax keeps on increasing after the third pulse application in a specific growth sector region and a clear anisotropic ΔT (t) behaviour has been found. The magnetic fluxes preferentially enter and leave the bulk superconductor through this sector region. The ΔT(t) behaviours are closely correlated with the distribution of the trapped field BTP and can be understood on the basis of the heat generation caused by the flux motion.

AB - The time evolutions and spatial distributions of temperature rise ΔT(t) have been measured on the surface of a cryo-cooled SmBaCuO bulk superconductor after iterative pulse field magnetizing with the same amplitude. For the applied pulse field Bex ≤ 4.64 T, the maximum temperature rise ΔTmax monotonically decreases and approaches a steady ΔT(t) behaviour with an increasing number of times of pulse applications. On the other hand, for Bex = 5.42 T, ΔTmax keeps on increasing after the third pulse application in a specific growth sector region and a clear anisotropic ΔT (t) behaviour has been found. The magnetic fluxes preferentially enter and leave the bulk superconductor through this sector region. The ΔT(t) behaviours are closely correlated with the distribution of the trapped field BTP and can be understood on the basis of the heat generation caused by the flux motion.

UR - http://www.scopus.com/inward/record.url?scp=0942299775&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0942299775&partnerID=8YFLogxK

U2 - 10.1088/0953-2048/17/1/009

DO - 10.1088/0953-2048/17/1/009

M3 - Article

AN - SCOPUS:0942299775

SN - 0953-2048

VL - 17

SP - 51

EP - 57

JO - Superconductor Science and Technology

JF - Superconductor Science and Technology

IS - 1

ER -

Temperature rise in an Sm-based bulk superconductor after applying iterative pulse fields

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this