Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa2Cu3Oy

Ken Ichiro Harashima, Shinjiro Tochihara, Hiroshi Yasuoka, Hiromasa Mazaki, Minoru Osada, Atsuyoshi Inoue, Masato Kakihana

Research output: Contribution to journalArticle

Abstract

We studied, both theoretically and experimentally, the ac magnetic response of type-II superconductors superimposed on a weak Hdc field. Theoretical simulations were made within the construct of the Kim-Anderson critical-state model, where the critical current density Jc is assumed to be given by Jc= k / (B0+|Bi|). k and B0 are temperature-dependent material parameters, and Bi is the local flux density in the sample. We also measured complex susceptibilities Xn=X′n-iX″n (n=1,2,3,5,7) of a melt-processed YBa2Cu3Oy specimen and analyzed the observed Xn by applying the magnetization equations derived from the Kim-Anderson model. We found that the experimental results were qualitatively well reproduced. Present results indicate that, for a specimen of which Jc sensitively varies with B1, the effect of a weak Hdc should be explicitly taken into consideration for studies of the ac magnetization.

Original languageEnglish
Pages (from-to)655-660
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume45
Issue number7
Publication statusPublished - 1998 Jul
Externally publishedYes

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Magnetization
Magnetic fields
Superconducting materials
Fluxes
Temperature

Keywords

  • Complex susceptibility
  • Critical-state model
  • Melt-processed YBaCuO

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

Cite this

Harashima, K. I., Tochihara, S., Yasuoka, H., Mazaki, H., Osada, M., Inoue, A., & Kakihana, M. (1998). Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa2Cu3Oy. Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, 45(7), 655-660.

Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa2Cu3Oy. / Harashima, Ken Ichiro; Tochihara, Shinjiro; Yasuoka, Hiroshi; Mazaki, Hiromasa; Osada, Minoru; Inoue, Atsuyoshi; Kakihana, Masato.

In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, Vol. 45, No. 7, 07.1998, p. 655-660.

Research output: Contribution to journalArticle

Harashima, KI, Tochihara, S, Yasuoka, H, Mazaki, H, Osada, M, Inoue, A & Kakihana, M 1998, 'Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa2Cu3Oy', Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy, vol. 45, no. 7, pp. 655-660.
Harashima, Ken Ichiro ; Tochihara, Shinjiro ; Yasuoka, Hiroshi ; Mazaki, Hiromasa ; Osada, Minoru ; Inoue, Atsuyoshi ; Kakihana, Masato. / Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa2Cu3Oy. In: Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy. 1998 ; Vol. 45, No. 7. pp. 655-660.
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