%0 Journal Article
%T Size-induced enhancement of bulk modulus and transition pressure of nanocrystalline Ge<br>高压下纳米锗的状态方程与相变
%A LGerward
%A Wang Hui
%A Liu Jin-Fang
%A He Yan
%A Chen Wei
%A Wang Ying
%A LGerward
%A Jiang Jian-Zhong
%A <br>王晖
%A 刘金芳
%A 何燕
%A 陈伟
%A 王莺
%A 蒋建中
%J 物理学报
%D 2007
%I 
%X In situ energy dispersive X-ray diffraction measurements with synchrotron radiation source have been performed on nanocrystalline Ge with particle sizes 13, 49 and 100 nm by using diamond anvil cell. Whereas the percentage volume collapse at the transition is almost constant, the values of the bulk modulus and transition pressure increase with decreasing particle size. Models are suggested to describe the grain-size dependences of bulk modulus and transition pressure. The trend of the predicted results is consistent with the experimental results while the absolute values are still different from experimental ones.
%K synchrotron radiation
%K XRD
%K bulk modulus
%K phase transition<br>同步辐射
%K X射线衍射
%K 体弹性模量
%K 相变
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1A7F80CA21754FB4E391D3B15D2132E0&yid=A732AF04DDA03BB3&vid=014B591DF029732F&iid=708DD6B15D2464E8&sid=48EB452A3150EB10&eid=3633A9C071F7819D&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=28