Raman phonons in multiferroic FeVO_4 crystals  

作　　者：张安民 刘凯 籍建葶 何长振 田勇 金峰 张清明 

机构地区：[1]Department of Physics, Beijing Key Laboratory of Opto-Electronic Functional Materials and Micro-nano Devices,Renmin University of China [2]State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences

出　　处：《Chinese Physics B》2015年第12期198-202,共5页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2012CB921701);the National Natural Science Foundation of China(Grant Nos.11174367 and 11004243);the China Postdoctoral Science Foundation;the Fundamental Research Funds for the Central Universities;the Research Funds of Renmin University of China(Grant Nos.10XNI038;14XNLF06;and 14XNLQ03)

摘　　要：Multiferroic materials are promising candidates for next-generation multi-functional devices, because of the coexistence of multi-orders and the coupling between the orders. FeVO4 has been confirmed to be a multiferroic compound,since it exhibits both ferroelectricity and antiferromagnetic ordering at low temperatures. In this paper, we have performed careful Raman scattering measurements on high-quality Fe VO4 single crystals. The compound has a very rich phonon structure due to its low crystal symmetry（P- 1） and at least 47 Raman-active phonon modes have been resolved in the low and hightemperature spectra. Most of the observed modes are well assigned with aid of first-principles calculations and symmetry analysis. The present study provides an experimental basis for exploring spin-lattice coupling and the mechanism of multiferroicity in FeVO4Multiferroic materials are promising candidates for next-generation multi-functional devices, because of the coexistence of multi-orders and the coupling between the orders. FeVO4 has been confirmed to be a multiferroic compound,since it exhibits both ferroelectricity and antiferromagnetic ordering at low temperatures. In this paper, we have performed careful Raman scattering measurements on high-quality Fe VO4 single crystals. The compound has a very rich phonon structure due to its low crystal symmetry（P- 1） and at least 47 Raman-active phonon modes have been resolved in the low and hightemperature spectra. Most of the observed modes are well assigned with aid of first-principles calculations and symmetry analysis. The present study provides an experimental basis for exploring spin-lattice coupling and the mechanism of multiferroicity in FeVO4

关 键 词：Raman scattering phonon assignment multiferroics 

分 类 号：O735[理学—晶体学]