Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes

Tetsuo Oka, Kensuke Hara, Jun Ogawa, Satoshi Fukui, Takao Sato, Kazuya Yokoyama, Akira Murakami, Marco Langer

研究成果: Article

3 引用 (Scopus)

抄録

The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.

元の言語English
記事番号7405303
ジャーナルIEEE Transactions on Applied Superconductivity
26
発行部数3
DOI
出版物ステータスPublished - 2016 4 1
外部発表Yes

Fingerprint

Magnets
Magnetic flux
magnets
sectors
magnetic flux
Magnetic fields
pulses
magnetic fields
heat generation
Heat generation
Temperature measurement
temperature measurement
Magnetization
tendencies
flux density
magnetization

ASJC Scopus subject areas

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

これを引用

Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes. / Oka, Tetsuo; Hara, Kensuke; Ogawa, Jun; Fukui, Satoshi; Sato, Takao; Yokoyama, Kazuya; Murakami, Akira; Langer, Marco.

:: IEEE Transactions on Applied Superconductivity, 巻 26, 番号 3, 7405303, 01.04.2016.

研究成果: Article

Oka, Tetsuo ; Hara, Kensuke ; Ogawa, Jun ; Fukui, Satoshi ; Sato, Takao ; Yokoyama, Kazuya ; Murakami, Akira ; Langer, Marco. / Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes. :: IEEE Transactions on Applied Superconductivity. 2016 ; 巻 26, 番号 3.
@article{bc30b2122931440e8f33c3add5138ac2,
title = "Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes",
abstract = "The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.",
keywords = "Bulk superconductor, flux invasion, macrostructure, magnetic flux density, pulsed field magnetization",
author = "Tetsuo Oka and Kensuke Hara and Jun Ogawa and Satoshi Fukui and Takao Sato and Kazuya Yokoyama and Akira Murakami and Marco Langer",
year = "2016",
month = "4",
day = "1",
doi = "10.1109/TASC.2016.2529425",
language = "English",
volume = "26",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - Selective Magnetic Field Invasion into HTS Bulk Magnets in Pulse Field Magnetizing Processes

AU - Oka, Tetsuo

AU - Hara, Kensuke

AU - Ogawa, Jun

AU - Fukui, Satoshi

AU - Sato, Takao

AU - Yokoyama, Kazuya

AU - Murakami, Akira

AU - Langer, Marco

PY - 2016/4/1

Y1 - 2016/4/1

N2 - The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.

AB - The magnetic flux invasion into the Dy123-based HTS bulk magnets were experimentally evaluated during the pulsed field magnetization processes. Since the invasion of the magnetic flux into the sample would be expected to be affected by the $J-{c}$ distribution, we estimated the differences of the magnetic flux motions between the growth sector boundary (GSB) and the growth sector region (GSR) by measuring the changes of magnetic flux density and temperature during the pulsed field application of 5 T at 30 K. The experimental results on the temperature measurement showed that the magnetic flux invades into the sample through the path in the GSR prior to that in the GRB region. Furthermore, the changing rate of magnetic flux gradually changed with the position on the GSR, while they irregularly changed and did not exhibited any tendency on the GSB. This means that the magnetic flux straightly invades the sample from GSR heading for the center portion, while it does not uniformly flow on the GRB. As a result, the heat generation occurs in the GSR area prior to the GSB region. The magnetic flux invasion behavior exhibits selective and nonuniform motion, reflecting the difference of the macrostructure on the GSR and the GSB.

KW - Bulk superconductor

KW - flux invasion

KW - macrostructure

KW - magnetic flux density

KW - pulsed field magnetization

UR - http://www.scopus.com/inward/record.url?scp=84963853687&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84963853687&partnerID=8YFLogxK

U2 - 10.1109/TASC.2016.2529425

DO - 10.1109/TASC.2016.2529425

M3 - Article

AN - SCOPUS:84963853687

VL - 26

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3

M1 - 7405303

ER -