Approach from temperature measurement to trapped field enhancement in HTSC bulks by pulse field magnetizing

Hiroyuki Fujishiro; Kazuya Yokoyama; Masahiko Kaneyama; Manabu Ikebe; Tetsuo Oka; Koshichi Noto

doi:10.1016/j.physc.2005.05.023

Approach from temperature measurement to trapped field enhancement in HTSC bulks by pulse field magnetizing

Hiroyuki Fujishiro, Kazuya Yokoyama, Masahiko Kaneyama, Manabu Ikebe, Tetsuo Oka, Koshichi Noto

Research output: Contribution to journal › Conference article

6 Citations (Scopus)

Abstract

The time dependences of the temperature rise ΔT(t) and the magnetization M(t) on the surface of the cryo-cooled SmBaCuO bulk superconductor have been investigated during the five successive magnetic pulse applications (No1-No5) of equal strength ranging from B_ex = 3.83-6.07 T. The pinning loss (Q_p) is estimated by the hysteresis loss Q^MH obtained by the M vs. applied field μ₀H_a curve and the viscous loss (Q_v) is estimated by subtracting Q^MH from the total Q which is estimated using the maximum temperature rise ΔT _max and the specific heat C. For the first pulse (No1) application, Q_p is a main origin of the heat generation and Q_v is dominant for the No5 pulse. The temperature measurements combined with the measurements of the M-μ₀H_a curve have been proved to give us the valuable information as for the enhancement of the trapped field by PFM.

Original language	English
Pages (from-to)	594-601
Number of pages	8
Journal	Physica C: Superconductivity and its applications
Volume	426-431
Issue number	I
DOIs	https://doi.org/10.1016/j.physc.2005.05.023
Publication status	Published - 2005 Oct 1
Externally published	Yes
Event	Proceedings of the 17th International Symposium on Superconductivity (ISS 2004) Advances in Supeconductivity - Duration: 2004 Nov 23 → 2004 Nov 25

Keywords

Heat generation
Hysteresis loss
Pinning and viscous loss
Pulse field magnetizing

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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Fujishiro, H., Yokoyama, K., Kaneyama, M., Ikebe, M., Oka, T., & Noto, K. (2005). Approach from temperature measurement to trapped field enhancement in HTSC bulks by pulse field magnetizing. Physica C: Superconductivity and its applications, 426-431(I), 594-601. https://doi.org/10.1016/j.physc.2005.05.023

Approach from temperature measurement to trapped field enhancement in HTSC bulks by pulse field magnetizing. / Fujishiro, Hiroyuki; Yokoyama, Kazuya; Kaneyama, Masahiko; Ikebe, Manabu; Oka, Tetsuo; Noto, Koshichi.

In: Physica C: Superconductivity and its applications, Vol. 426-431, No. I, 01.10.2005, p. 594-601.

Research output: Contribution to journal › Conference article

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abstract = "The time dependences of the temperature rise ΔT(t) and the magnetization M(t) on the surface of the cryo-cooled SmBaCuO bulk superconductor have been investigated during the five successive magnetic pulse applications (No1-No5) of equal strength ranging from Bex = 3.83-6.07 T. The pinning loss (Qp) is estimated by the hysteresis loss QMH obtained by the M vs. applied field μ0Ha curve and the viscous loss (Qv) is estimated by subtracting QMH from the total Q which is estimated using the maximum temperature rise ΔT max and the specific heat C. For the first pulse (No1) application, Qp is a main origin of the heat generation and Qv is dominant for the No5 pulse. The temperature measurements combined with the measurements of the M-μ0Ha curve have been proved to give us the valuable information as for the enhancement of the trapped field by PFM.",

keywords = "Heat generation, Hysteresis loss, Pinning and viscous loss, Pulse field magnetizing",

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AU - Oka, Tetsuo

AU - Noto, Koshichi

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AB - The time dependences of the temperature rise ΔT(t) and the magnetization M(t) on the surface of the cryo-cooled SmBaCuO bulk superconductor have been investigated during the five successive magnetic pulse applications (No1-No5) of equal strength ranging from Bex = 3.83-6.07 T. The pinning loss (Qp) is estimated by the hysteresis loss QMH obtained by the M vs. applied field μ0Ha curve and the viscous loss (Qv) is estimated by subtracting QMH from the total Q which is estimated using the maximum temperature rise ΔT max and the specific heat C. For the first pulse (No1) application, Qp is a main origin of the heat generation and Qv is dominant for the No5 pulse. The temperature measurements combined with the measurements of the M-μ0Ha curve have been proved to give us the valuable information as for the enhancement of the trapped field by PFM.

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