Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet

Tetsuo Oka, Nobutaka Kawasaki, Satoshi Fukui, Jun Ogawa, Takao Sato, Toshihisa Terasawa, Yoshitaka Itoh, Ryohei Yabuno

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Demagnetized rare earth magnets (Nd-Fe-B) can be fully magnetized by scanning them in the intense static fields over 3 T of a HTS bulk magnet which was cooled to the temperature range lower than 77K with use of cryo-coolers and activated by the field of 5 T. We precisely examined the magnetic field distributions of magnetized permanent magnets. The magnetic poles were in the narrow space on the surface of the permanent magnet with varying gap distances between the tracks of the HTS magnetic pole. Steep magnetic transitions between N and S were observed in the magnetic field distribution maps after the HTS magnetic poles were alternatively scanned for several times. The magnetizing method has been proposed for designing novel electromagnetic devices including magnetically excellent rare earth magnets which require intense magnetic fields over 3 T.

Original languageEnglish
Article number6101562
JournalIEEE Transactions on Applied Superconductivity
Volume22
Issue number3
DOIs
Publication statusPublished - 2012 Jun 25
Externally publishedYes

Fingerprint

magnetic poles
permanent magnets
Permanent magnets
Magnets
Poles
magnets
Magnetic fields
Rare earths
rare earth elements
magnetic fields
coolers
electromagnetism
Scanning
scanning
Temperature
temperature

Keywords

  • Bulk superconductor
  • magnetic field
  • permanent magnet
  • refrigerator
  • trapped field

ASJC Scopus subject areas

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

Cite this

Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet. / Oka, Tetsuo; Kawasaki, Nobutaka; Fukui, Satoshi; Ogawa, Jun; Sato, Takao; Terasawa, Toshihisa; Itoh, Yoshitaka; Yabuno, Ryohei.

In: IEEE Transactions on Applied Superconductivity, Vol. 22, No. 3, 6101562, 25.06.2012.

Research output: Contribution to journalArticle

Oka, Tetsuo ; Kawasaki, Nobutaka ; Fukui, Satoshi ; Ogawa, Jun ; Sato, Takao ; Terasawa, Toshihisa ; Itoh, Yoshitaka ; Yabuno, Ryohei. / Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet. In: IEEE Transactions on Applied Superconductivity. 2012 ; Vol. 22, No. 3.
@article{87f9ab228365479e94479906e15b0950,
title = "Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet",
abstract = "Demagnetized rare earth magnets (Nd-Fe-B) can be fully magnetized by scanning them in the intense static fields over 3 T of a HTS bulk magnet which was cooled to the temperature range lower than 77K with use of cryo-coolers and activated by the field of 5 T. We precisely examined the magnetic field distributions of magnetized permanent magnets. The magnetic poles were in the narrow space on the surface of the permanent magnet with varying gap distances between the tracks of the HTS magnetic pole. Steep magnetic transitions between N and S were observed in the magnetic field distribution maps after the HTS magnetic poles were alternatively scanned for several times. The magnetizing method has been proposed for designing novel electromagnetic devices including magnetically excellent rare earth magnets which require intense magnetic fields over 3 T.",
keywords = "Bulk superconductor, magnetic field, permanent magnet, refrigerator, trapped field",
author = "Tetsuo Oka and Nobutaka Kawasaki and Satoshi Fukui and Jun Ogawa and Takao Sato and Toshihisa Terasawa and Yoshitaka Itoh and Ryohei Yabuno",
year = "2012",
month = "6",
day = "25",
doi = "10.1109/TASC.2011.2179510",
language = "English",
volume = "22",
journal = "IEEE Transactions on Applied Superconductivity",
issn = "1051-8223",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "3",

}

TY - JOUR

T1 - Magnetic field distribution of permanent magnet magnetized by static magnetic field generated by HTS bulk magnet

AU - Oka, Tetsuo

AU - Kawasaki, Nobutaka

AU - Fukui, Satoshi

AU - Ogawa, Jun

AU - Sato, Takao

AU - Terasawa, Toshihisa

AU - Itoh, Yoshitaka

AU - Yabuno, Ryohei

PY - 2012/6/25

Y1 - 2012/6/25

N2 - Demagnetized rare earth magnets (Nd-Fe-B) can be fully magnetized by scanning them in the intense static fields over 3 T of a HTS bulk magnet which was cooled to the temperature range lower than 77K with use of cryo-coolers and activated by the field of 5 T. We precisely examined the magnetic field distributions of magnetized permanent magnets. The magnetic poles were in the narrow space on the surface of the permanent magnet with varying gap distances between the tracks of the HTS magnetic pole. Steep magnetic transitions between N and S were observed in the magnetic field distribution maps after the HTS magnetic poles were alternatively scanned for several times. The magnetizing method has been proposed for designing novel electromagnetic devices including magnetically excellent rare earth magnets which require intense magnetic fields over 3 T.

AB - Demagnetized rare earth magnets (Nd-Fe-B) can be fully magnetized by scanning them in the intense static fields over 3 T of a HTS bulk magnet which was cooled to the temperature range lower than 77K with use of cryo-coolers and activated by the field of 5 T. We precisely examined the magnetic field distributions of magnetized permanent magnets. The magnetic poles were in the narrow space on the surface of the permanent magnet with varying gap distances between the tracks of the HTS magnetic pole. Steep magnetic transitions between N and S were observed in the magnetic field distribution maps after the HTS magnetic poles were alternatively scanned for several times. The magnetizing method has been proposed for designing novel electromagnetic devices including magnetically excellent rare earth magnets which require intense magnetic fields over 3 T.

KW - Bulk superconductor

KW - magnetic field

KW - permanent magnet

KW - refrigerator

KW - trapped field

UR - http://www.scopus.com/inward/record.url?scp=84862560401&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862560401&partnerID=8YFLogxK

U2 - 10.1109/TASC.2011.2179510

DO - 10.1109/TASC.2011.2179510

M3 - Article

VL - 22

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

SN - 1051-8223

IS - 3

M1 - 6101562

ER -