Trapped field and temperature rise in rectangular-shaped HTSC bulk magnetized by pulse fields

T. Tateiwa; Y. Sazuka; H. Fujishiro; H. Hayashi; T. Nagafuchi; T. Oka

doi:10.1016/j.physc.2007.03.442

Trapped field and temperature rise in rectangular-shaped HTSC bulk magnetized by pulse fields

T. Tateiwa, Y. Sazuka, H. Fujishiro, H. Hayashi, T. Nagafuchi, T. Oka

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

9 Citations (Scopus)

Abstract

A rectangular-shaped GdBaCuO bulk (33 × 33 × 20 mm³) has been magnetized by pulse fields with various strengths from B_ex = 3 T to 7 T at 44 K and 20 K. The time dependences of the local fields and temperatures have been measured at five positions on the bulk surface. The flux movement, flux trapping and the heat generation are closely related for lower applied fields, i.e., the temperature rise is larger at the specified positions, where a large number of magnetic fluxes are trapped. The heat generation is mainly due to the pinning loss in this condition. The maximum trapped field B_T = 4.0 T can be realized on the bulk surface by a modified multi-pulse technique with stepwise cooling (MMPSC) method, on which B_T reaches only 2.5 T at 20 K for a single pulse application.

Original language	English
Pages (from-to)	398-401
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.03.442
Publication status	Published - 2007 Oct 1
Externally published	Yes

Keywords

MMPSC method
Pulse field magnetization
Rectangular-shaped bulk
Temperature rise
Trapped field

ASJC Scopus subject areas

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

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title = "Trapped field and temperature rise in rectangular-shaped HTSC bulk magnetized by pulse fields",

abstract = "A rectangular-shaped GdBaCuO bulk (33 × 33 × 20 mm3) has been magnetized by pulse fields with various strengths from Bex = 3 T to 7 T at 44 K and 20 K. The time dependences of the local fields and temperatures have been measured at five positions on the bulk surface. The flux movement, flux trapping and the heat generation are closely related for lower applied fields, i.e., the temperature rise is larger at the specified positions, where a large number of magnetic fluxes are trapped. The heat generation is mainly due to the pinning loss in this condition. The maximum trapped field BT = 4.0 T can be realized on the bulk surface by a modified multi-pulse technique with stepwise cooling (MMPSC) method, on which BT reaches only 2.5 T at 20 K for a single pulse application.",

keywords = "MMPSC method, Pulse field magnetization, Rectangular-shaped bulk, Temperature rise, Trapped field",

author = "T. Tateiwa and Y. Sazuka and H. Fujishiro and H. Hayashi and T. Nagafuchi and T. Oka",

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T1 - Trapped field and temperature rise in rectangular-shaped HTSC bulk magnetized by pulse fields

AU - Tateiwa, T.

AU - Sazuka, Y.

AU - Fujishiro, H.

AU - Hayashi, H.

AU - Nagafuchi, T.

AU - Oka, T.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - A rectangular-shaped GdBaCuO bulk (33 × 33 × 20 mm3) has been magnetized by pulse fields with various strengths from Bex = 3 T to 7 T at 44 K and 20 K. The time dependences of the local fields and temperatures have been measured at five positions on the bulk surface. The flux movement, flux trapping and the heat generation are closely related for lower applied fields, i.e., the temperature rise is larger at the specified positions, where a large number of magnetic fluxes are trapped. The heat generation is mainly due to the pinning loss in this condition. The maximum trapped field BT = 4.0 T can be realized on the bulk surface by a modified multi-pulse technique with stepwise cooling (MMPSC) method, on which BT reaches only 2.5 T at 20 K for a single pulse application.

AB - A rectangular-shaped GdBaCuO bulk (33 × 33 × 20 mm3) has been magnetized by pulse fields with various strengths from Bex = 3 T to 7 T at 44 K and 20 K. The time dependences of the local fields and temperatures have been measured at five positions on the bulk surface. The flux movement, flux trapping and the heat generation are closely related for lower applied fields, i.e., the temperature rise is larger at the specified positions, where a large number of magnetic fluxes are trapped. The heat generation is mainly due to the pinning loss in this condition. The maximum trapped field BT = 4.0 T can be realized on the bulk surface by a modified multi-pulse technique with stepwise cooling (MMPSC) method, on which BT reaches only 2.5 T at 20 K for a single pulse application.

KW - MMPSC method

KW - Pulse field magnetization

KW - Rectangular-shaped bulk

KW - Temperature rise

KW - Trapped field

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IS - SUPPL.

ER -

Trapped field and temperature rise in rectangular-shaped HTSC bulk magnetized by pulse fields

Abstract

Keywords

ASJC Scopus subject areas

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