Raman and Mid-IR Spectral Analysis of the Atacamite-Structure Hydroxyl/Deuteroxyl Nickel Chlorides Ni_(2)(OH/D)_(3)Cl

作     者：刘晓东 萩原雅人 郑旭光 孟冬冬 郭其新 LIU Xiao-Dong;Hagihala Masato;ZHENG Xu-Guang;MENG Dong-Dong;GUO Qi-Xin

作者机构：Department of PhysicsGraduate School of Science and EngineeringSaga UniversitySaga 840-8502Japan Department of PhysicsCollege of ScienceTianjin Polytechnic UniversityTianjin 300160 Department of PhysicsFaculty of Science and EngineeringSaga UniversitySaga 840-8502Japan Synchrotron Light Application Center&Department of Electrical and Electronic EngineeringSaga UniversitySaga 840-8502Japan 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2011年第28卷第8期

页      面：314-317页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0803[工学-光学工程] 0704[理学-天文学] 

基　　金：by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science under Grant (No Kiban-B 19340100) Grant-in-Aid for Scientific Research on Priority Areas(No Tokutei 22014008)from the Ministry of Education,Culture,Sports,Science and Technology,Japan. 

主　　题：temperature stretching transition 

摘      要：Vibrational spectra(Raman 4000–95 cm−1 and mid-IR 4000–400 cm−1)of the atacamite-structure Ni_(2)(OH)3Cl,including a rarely reported kind of asymmetric trimetric hydrogen bond,as a member of the geometrically frustrated material series and its deuteride Ni_(2)(OD)3Cl are,to the best of our knowledge,reported for the first time and analyzed at room temperature.Through a comparative study of four spectra according to their crystal structural parameters,we assign OH stretching modes v(OH)in a functional group region(3700–3400 cm−1)and their deformation modesδ(NiOH/D)in the correlation peak region(900–600 cm−1)with the corresponding mode frequency ratiosωv(OD)/ωv(OH)≈73%andωδ(NiOD)/ωδ(NiOH)≈75%,and further self−consistently suggest Ni-O and Ni-Cl related modes in the fingerprint region(500–200 cm^(−1) and 200–0 cm−1,respectively)by use of the unified six-ligand NiO_(5)Cl and NiO_(4)Cl_(2) frames.This report may contribute to the spectral analysis of other hydroxyl transition-metal halides and to the understanding of the fundamental physics of their exotic magnetic geometrical frustration property from the spectral changes around the corresponding low transition temperatures.