کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9781627 | 1511633 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Superfluid transition and solidification of 4He in aerogel
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
Superfluid transition and solidification of 4He in aerogel has been studied by longitudinal ultrasound. The superfluid transition temperature was determined up to the solidification pressure. The superfluid transition temperature in aerogel which was identified as a sharp absorption peak was suppressed from that in bulk liquid. The magnitude of suppression in aerogel was a few milli-Kelvin from the saturated vapor pressure to the solidification pressure and was much smaller than that in other porous media. The onset of solidification of 4He in aerogel was identified as an increase in sound absorption. It was shown that the overpressure required to initiate solidification was 0.2-0.3Â MPa between 1.1 and 1.8Â K. Small hysteresis was observed at the solidification and melting.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issues 8â9, AugustâSeptember 2005, Pages 1486-1489
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issues 8â9, AugustâSeptember 2005, Pages 1486-1489
نویسندگان
Koichi Matsumoto, Masaaki Nishikawa, Keiichi Yoshino, Satoshi Abe, Haruhiko Suzuki, Dmitrii A. Tayurskii, Koji Tajiri,