کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1481970 | 991550 | 2012 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Regenerator performance below 4 K in Tm-based bulk metallic glasses Regenerator performance below 4 K in Tm-based bulk metallic glasses](/preview/png/1481970.png)
The main obstacle for reaching low temperatures below 4 K using cryocoolers was the inefficiency of the regenerator materials. We report that large volumetric specific heat below 4 K in a wide temperature range has been obtained in Tm-based bulk metallic glasses, and the peak temperature of specific heat peak is tunable. We show that the amorphization of rare-earth based crystalline alloys and the lower magnetic transition temperature of spin glass behavior in the glasses result in the specific heat anomaly below 4 K. The large and tunable specific heat anomaly below 4 K indicates the potential regenerator performance of the glassy materials for sub-4 K cryocoolers.
► Large specific heat below 4 K in Tm-based bulk metallic glasses.
► The amorphization and spin glass behavior in the glasses result in the specific heat anomaly.
► Potential regenerator performance of the glass for sub-4 K cryocoolers.
Journal: Journal of Non-Crystalline Solids - Volume 358, Issue 14, 15 July 2012, Pages 1716–1719