抄録
Pulse field magnetizing (PFM) using five successive magnetic pulses (Nos 1-5) with the same amplitude from 3.01 to 5.42 T has been performed for three types of cryo-cooled REBaCuO bulk superconductor discs (RE = Gd, Sm, Y) with an identical size. The time evolution and spatial distribution of temperature T(t), the total trapped magnetic flux φT P and the trapped magnetic field BT P have been measured after applying the magnetic pulse. The total magnetic flux φT FC trapped by the field cooled magnetizing (FCM) is the largest for the Gd bulk and is the smallest for the Y bulk. The time and position dependences of T(t) during PFM show a characteristic behaviour depending on the species of bulks which results from the difference in the strength of the pinning force Fp. The generated heat Q(No i) after the No i pulse has been estimated based on the maximum temperature rise ΔTmax and the specific heat C. The ΔQ = Q(No 1)-Q(No 5) value, which is mainly contributed by the pinning power loss (Qp) for pulse No 1, is the smallest for the Y bulk, and the Q(No 5) value, which is mainly contributed by the viscous flow loss (Q v), is the smallest for the Gd bulk. These results suggest that the heat generation by PFM is closely related to the strength of Fp of the bulk crystal.
| 元の言語 | English |
|---|---|
| ページ（範囲） | 158-165 |
| ページ数 | 8 |
| ジャーナル | Superconductor Science and Technology |
| 巻 | 18 |
| 発行部数 | 1 |
| DOI | |
| 出版物ステータス | Published - 2005 1 1 |
| 外部発表 | Yes |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
これを引用
Generated heat during pulse field magnetizing for REBaCuO (RE = Gd, Sm, Y) bulk superconductors with different pinning abilities. / Fujishiro, Hiroyuki; Kaneyama, Masahiko; Yokoyama, Kazuya; Oka, Tetsuo; Noto, Koshichi.
：: Superconductor Science and Technology, 巻 18, 番号 1, 01.01.2005, p. 158-165.研究成果: Article
}
TY - JOUR
T1 - Generated heat during pulse field magnetizing for REBaCuO (RE = Gd, Sm, Y) bulk superconductors with different pinning abilities
AU - Fujishiro, Hiroyuki
AU - Kaneyama, Masahiko
AU - Yokoyama, Kazuya
AU - Oka, Tetsuo
AU - Noto, Koshichi
PY - 2005/1/1
Y1 - 2005/1/1
N2 - Pulse field magnetizing (PFM) using five successive magnetic pulses (Nos 1-5) with the same amplitude from 3.01 to 5.42 T has been performed for three types of cryo-cooled REBaCuO bulk superconductor discs (RE = Gd, Sm, Y) with an identical size. The time evolution and spatial distribution of temperature T(t), the total trapped magnetic flux φT P and the trapped magnetic field BT P have been measured after applying the magnetic pulse. The total magnetic flux φT FC trapped by the field cooled magnetizing (FCM) is the largest for the Gd bulk and is the smallest for the Y bulk. The time and position dependences of T(t) during PFM show a characteristic behaviour depending on the species of bulks which results from the difference in the strength of the pinning force Fp. The generated heat Q(No i) after the No i pulse has been estimated based on the maximum temperature rise ΔTmax and the specific heat C. The ΔQ = Q(No 1)-Q(No 5) value, which is mainly contributed by the pinning power loss (Qp) for pulse No 1, is the smallest for the Y bulk, and the Q(No 5) value, which is mainly contributed by the viscous flow loss (Q v), is the smallest for the Gd bulk. These results suggest that the heat generation by PFM is closely related to the strength of Fp of the bulk crystal.
AB - Pulse field magnetizing (PFM) using five successive magnetic pulses (Nos 1-5) with the same amplitude from 3.01 to 5.42 T has been performed for three types of cryo-cooled REBaCuO bulk superconductor discs (RE = Gd, Sm, Y) with an identical size. The time evolution and spatial distribution of temperature T(t), the total trapped magnetic flux φT P and the trapped magnetic field BT P have been measured after applying the magnetic pulse. The total magnetic flux φT FC trapped by the field cooled magnetizing (FCM) is the largest for the Gd bulk and is the smallest for the Y bulk. The time and position dependences of T(t) during PFM show a characteristic behaviour depending on the species of bulks which results from the difference in the strength of the pinning force Fp. The generated heat Q(No i) after the No i pulse has been estimated based on the maximum temperature rise ΔTmax and the specific heat C. The ΔQ = Q(No 1)-Q(No 5) value, which is mainly contributed by the pinning power loss (Qp) for pulse No 1, is the smallest for the Y bulk, and the Q(No 5) value, which is mainly contributed by the viscous flow loss (Q v), is the smallest for the Gd bulk. These results suggest that the heat generation by PFM is closely related to the strength of Fp of the bulk crystal.
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UR - http://www.scopus.com/inward/citedby.url?scp=12144281778&partnerID=8YFLogxK
U2 - 10.1088/0953-2048/18/1/025
DO - 10.1088/0953-2048/18/1/025
M3 - Article
AN - SCOPUS:12144281778
VL - 18
SP - 158
EP - 165
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 1
ER -