低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
ISSN-L : 0389-2441
研究論文
準静的磁場による磁化過程における溶融超伝導バルク磁石の温度変化と磁場特性
岡 徹雄横山 和哉藤代 博之能登 宏七
著者情報
ジャーナル フリー

2009 年 44 巻 12 号 p. 587-593

詳細
抄録

The temperature changes and magnetic-field trapping behaviors of melt-textured, single-domain Sm-Ba-Cu-O bulk superconductors have been precisely investigated for magnetizing processes by means of quasi-static magnetic fields such as field cooling (FC) and zero field cooling (ZFC). The experiments were conducted in the temperature range of 40-80 K by simultaneously measuring both the temperature and magnetic flux density. According to the balance of heat generation and drainage, the temperature evolution profiles show distinctive behaviors of the invading and exhausting magnetic fluxes into and out of the HTS bulk magnet. The average temperature change during the FC process reached the maximum value of 4.63 K when the sweep rate was 11.3 mT/s and the initial temperature was 45.6 K. In the ZFC process, both the temperature and magnetic flux density kept increasing gradually even after the external magnetic field stopped growing at 5 T in the ascending field process. The highest temperature rise due to the flux motion reached 4.6 K even when the sample was magnetized with at sweeping rate of 11.3 mT/s. As the behavior of temperature rise was different between the ascending and descending field processes, it is suggested that the magnetic fluxes in the processes invade and diffuse under different heating characteristics.

著者関連情報
© 2009 公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
前の記事 次の記事
feedback
Top