Raman Band Redshifting of α-Cu2(OH)3Cl with Decreasing the Temperature

摘要：

　　Raman spectra of the magnetic geometric frustration material-the botallackite-structure α-Cu2(OH)3C1 polycrystalline sample were measured down to liquid N2 temperature.It is found that the hydroxyl stretching bands shift abnormally according to the lattice thermal expansion effect of normal materials,i.e.,they redshift with decreasing the sample temperature (negative thermal expansion) using liquid N2 cooling while other bands blueshifl.This abnormality was also confirmed by observing the band-shifting caused by local laser heating effect using different laser powers,and can be qualitatively explained by checking the local hydroxyl environment with a trimeric hydrogen bond.

关键词： Raman band redshifting negative thermal expansion local laser heating effect

作者: Xiaodong Liu Xingliang Xu Dongdong Meng Masayoshi Fujihala Xuguang Zheng Zhengwei Chen Qixin Guo

作者单位: Department of Physics, College of Science, Tianjin Polytechnic University, Tianjin 300387, China ;De Department of Physics, Faculty of Science and Engineering, Saga University, Saga 840-8502, Japan Synchrotron Light Application Center & Department of Electrical and Electronic Engineering, Saga Uni

会议类型: 国际会议

会议名称: the 2012 International Conference on Frontiers of Advanced Materials and Engineering Technology (2012年先进材料与工程技术国际会议(FAMET 2012))

会议地点: 厦门

会议语种:英文

页码: 391-394

在线出版日期: 2012-01-04（万方平台首次上网日期，不代表论文的发表时间）