| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Curie Transition of NC Nickel by Mechanical Spectroscopy and Magnetization Study |
| LI Ping-Yun1, CAO Zhen-Hua1, ZHANG Xi-Yan2, WU Xiao-Lei3, HUANG Yi-Neng1, MENG Xiang-Kang1 |
| 1National Laboratory of Solid State Microstructures, Department of Materials Science and Engineering, and Department of Physics, Nanjing University, Nanjing 2100932School of Materials Science and Engineering, Chongqing University, Chongqing 4000303State Key Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190 |
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LI Ping-Yun, CAO Zhen-Hua, ZHANG Xi-Yan et al 2009 Chin. Phys. Lett. 26 036102 |
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Abstract Mechanical spectroscopy measurement is performed to study the internal friction of nanocrystalline (NC) nickel with an average grain size of 23nm from room temperature to 610K. An internal friction peak is observed at about 550K, which corresponds to the Curie transition process of the NC nickel according to the result of magnetization test. Moreover, the fact that the Curie temperature of NC nickel is lower than that of coarse-grained nickel is explained by an analytical model based on the weakening of cohesive energy.
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| Keywords:
61.46.Hk
64.70.Nd
64.60.My
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Received: 20 October 2008
Published: 19 February 2009
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