中国物理B ›› 1997, Vol. 6 ›› Issue (10): 752-757.doi: 10.1088/1004-423X/6/10/006

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

INFLUENCE OF RELATIVE DENSITY AND PARTICLE SIZE ON THE SPECIFIC HEAT OF NANOCRYSTALLINE IRON

童晓树1, 金铎1, 白海洋1, 雒建林1, 王文魁2   

  1. (1)Cryogenic Laboratory, Academia Sinica, Beijing 100080, China; (2)Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1997-04-15 出版日期:1997-10-20 发布日期:1997-10-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China.

INFLUENCE OF RELATIVE DENSITY AND PARTICLE SIZE ON THE SPECIFIC HEAT OF NANOCRYSTALLINE IRON

TONG XIAO-SHU (童晓树)a, JIN DUO (金铎)a, BAI HAI-YANG (白海洋)a, LUO JIAN-LIN (雒建林)a, WANG WEN-KUI (王文魁)b   

  1. a Cryogenic Laboratory, Academia Sinica, Beijing 100080, China; b Institute of Physics, Academia Sinica, Beijing 100080, China
  • Received:1997-04-15 Online:1997-10-20 Published:1997-10-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China.

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摘要： The specific heats of two nanocrystalline iron samples with different structures have been measured in the temperature range from 2 to 26 K. Experimental results show that the specific heat of nanocrystalline iron samples exhibits abnormal characteristic compared with that of standard bulk iron. The contributions of quantum size effect, surface mode and Einstein mode have been observed in the measurement. Through analyses, it is discovered that the relative density and particle size have a great influence on specific heat of nanocrystalline iron at low temperature.

Abstract: The specific heats of two nanocrystalline iron samples with different structures have been measured in the temperature range from 2 to 26 K. Experimental results show that the specific heat of nanocrystalline iron samples exhibits abnormal characteristic compared with that of standard bulk iron. The contributions of quantum size effect, surface mode and Einstein mode have been observed in the measurement. Through analyses, it is discovered that the relative density and particle size have a great influence on specific heat of nanocrystalline iron at low temperature.

中图分类号: 

  • 65.80.+n
72.30.+q (High-frequency effects; plasma effects) 73.63.-b (Electronic transport in nanoscale materials and structures) 61.46.Hk (Nanocrystals)