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

doi:10.2497/jjspm.45.655

Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa₂Cu₃O_y

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

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

Abstract

We studied, both theoretically and experimentally, the ac magnetic response of type-II superconductors superimposed on a weak H_dc field. Theoretical simulations were made within the construct of the Kim-Anderson critical-state model, where the critical current density J_c is assumed to be given by J_c= k / (B₀+|B_i|). k and B₀ are temperature-dependent material parameters, and B_i is the local flux density in the sample. We also measured complex susceptibilities X_n=X′_n-iX″_n (n=1,2,3,5,7) of a melt-processed YBa₂Cu₃O_y specimen and analyzed the observed X_n 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 J_c sensitively varies with B₁, the effect of a weak H_dc should be explicitly taken into consideration for studies of the ac magnetization.

Original language	English
Pages (from-to)	655-660
Number of pages	6
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	45
Issue number	7
DOIs	https://doi.org/10.2497/jjspm.45.655
Publication status	Published - 1998 Jul

Keywords

Complex susceptibility
Critical-state model
Melt-processed YBaCuO

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2497/jjspm.45.655

Cite this

Effect of Weak DC Magnetic Fields on the AC Magnetization of a Melt-Processed YBa₂Cu₃O_y. / 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 journal › Article › peer-review

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