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

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

• Publisher: Elsevier Science
• Year: 2005
• Tongue: English
• Weight: 307 KB
• Volume: 426-431
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2005.05.023

✦ Synopsis

The time dependences of the temperature rise DT(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 l 0 H 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 DT 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-l 0 H a curve have been proved to give us the valuable information as for the enhancement of the trapped field by PFM.