Twist effect on hysteresis loss in Bi2223 multifilamentary wires exposed to an AC magnetic field

Masataka Iwakuma; Y. Tajika; Kazuhiro Kajikawa; K. Funaki; T. Matsushita; E. S. Otabe; N. Ayai; K. Hayashi; K. Sato

doi:10.1016/S0921-4534(98)00452-3

Twist effect on hysteresis loss in Bi2223 multifilamentary wires exposed to an AC magnetic field

Masataka Iwakuma, Y. Tajika, Kazuhiro Kajikawa, K. Funaki, T. Matsushita, E. S. Otabe, N. Ayai, K. Hayashi, K. Sato

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

7 Citations (Scopus)

Abstract

We fabricated Bi2223 multifilamentary sample wires with various twist pitches and investigated the electromagnetic properties experimentally. They showed monofilamentlike electromagnetic properties regardless of twisting due to the contacts among filaments and/or proximity effect. The observed AC losses in the non-twisted sample wire agreed roughly with the theoretical prediction for a homogeneous superconducting slab with the same thickness of the filamentary region on the basis of Irie-Yamafuji model. However the AC losses in the twisted wires deviated from the theoretical ones, especially for the amplitude around the theoretically predicted penetration field of the slab. We showed that the observed AC loss properties can be explained by both the twist effect for the macroscopic shielding current and the contribution of the local shielding current.

Original language	English
Pages (from-to)	154-158
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	310
Issue number	1-4
DOIs	https://doi.org/10.1016/S0921-4534(98)00452-3
Publication status	Published - Jan 1 1998

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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Twist effect on hysteresis loss in Bi2223 multifilamentary wires exposed to an AC magnetic field. / Iwakuma, Masataka; Tajika, Y.; Kajikawa, Kazuhiro; Funaki, K.; Matsushita, T.; Otabe, E. S.; Ayai, N.; Hayashi, K.; Sato, K.

In: Physica C: Superconductivity and its applications, Vol. 310, No. 1-4, 01.01.1998, p. 154-158.

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

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abstract = "We fabricated Bi2223 multifilamentary sample wires with various twist pitches and investigated the electromagnetic properties experimentally. They showed monofilamentlike electromagnetic properties regardless of twisting due to the contacts among filaments and/or proximity effect. The observed AC losses in the non-twisted sample wire agreed roughly with the theoretical prediction for a homogeneous superconducting slab with the same thickness of the filamentary region on the basis of Irie-Yamafuji model. However the AC losses in the twisted wires deviated from the theoretical ones, especially for the amplitude around the theoretically predicted penetration field of the slab. We showed that the observed AC loss properties can be explained by both the twist effect for the macroscopic shielding current and the contribution of the local shielding current.",

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AU - Iwakuma, Masataka

AU - Tajika, Y.

AU - Kajikawa, Kazuhiro

AU - Funaki, K.

AU - Matsushita, T.

AU - Otabe, E. S.

AU - Ayai, N.

AU - Hayashi, K.

AU - Sato, K.

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