Size-dependent Curie transition of Ni nanocrystals

被引：0
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作者：
Lu, H.M. [1 ]
Li, P.Y. [1 ]
Huang, Y.N. [1 ]
Meng, X.K. [1 ]
Zhang, X.Y. [2 ]
Liu, Q. [2 ]
机构：
[1] Department of Materials Science and Engineering, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
[2] School of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
来源：
Journal of Applied Physics | 2009年 / 105卷 / 02期
关键词：
The mechanical spectroscopy and magnetization measurements are performed on Ni nanocrystals from room temperature to 650 K. It is found that the peak temperatures of internal friction are in agreement with the corresponding Curie temperatures of Ni nanocrystals obtained from the magnetization-temperature curves; showing that the traditional mechanical spectroscopy can also be employed to investigate the Curie transition of ferromagnetic nanocrystals. Moreover; the analytical model for size-dependent Curie temperature is proposed in terms of a size-dependent melting temperature model. The Curie temperature drops with decreasing grain size in Ni nanocrystals; which agrees with the corresponding experimental results. © 2009 American Institute of Physics;
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