低温工学
Online ISSN : 1880-0408
Print ISSN : 0389-2441
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41 巻 , 8 号
選択された号の論文の6件中1~6を表示しています
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巻頭言
基礎講座
研究論文
  • 難波 雅史, 淡路 智, 磯野 伸之, 渡辺 和雄, Miryala MURALIDHAR, 腰塚 直己, 村上 雅人
    41 巻 (2006) 8 号 p. 359-364
    公開日: 2007/02/15
    ジャーナル フリー
    The bulk material comprised of (Nd, Eu, Gd)Ba2Cu3Ox(NEG123) shows a high irreversibility field over 14 T at 77.3 K. In order to study the origin of the high irreversibility field, transport measurements of NEG123 and Y123 bulk samples were performed as functions of temperature, high magnetic field and field angle, and transport properties were compared with each other. Dip structures for the angular dependence of resistivity are observed around B//c for all samples. These results indicate that c-axis correlated disorder exists. The NEG123 bulk sample with a larger dip shows a higher irreversibility temperature. In addition, we found that the differences of the irreversibility temperature between on and 12° off the dip are scaled universally as a function of the depth of the dip for NEG123 and Y123 bulk samples. It is considered that c-axis correlated disorder is important for high irreversibility fields.
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  • 三島 史人, 藤本 祐孝, 武田 真一, 泉 佳伸, 西嶋 茂宏
    41 巻 (2006) 8 号 p. 365-370
    公開日: 2007/02/15
    ジャーナル フリー
    We have been developing a magnetically targeted drug delivery system (MT-DDS), which involves a drug having small biocompatible magnetic particles and a high-gradient magnetic field to guide it in the targeted region. Efficient drug navigation requires that the drug be prevented from accumulating on the wall of the blood vessel when in route to the targeted region, thus an appropriate magnetic field must be designed. Magnet arrangement was studied to obtain an efficient drug delivery system by calculating the trajectory of the ferromagnetic particles in the blood vessel.
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