RAMAN-SPECTRUM OF NICL2

被引:20
作者
LOCKWOOD, DJ
BERTRAND, D
CARRARA, P
MISCHLER, G
BILLEREY, D
TERRIER, C
机构
[1] CNRS,PHYS SOLIDES LAB,F-31077 TOULOUSE,FRANCE
[2] UNIV NANCY 1,THERMOMAGNET LAB,F-54037 NANCY,FRANCE
来源
JOURNAL OF PHYSICS C-SOLID STATE PHYSICS | 1979年 / 12卷 / 17期
关键词
D O I
10.1088/0022-3719/12/17/031
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The Raman spectrum of NiCl2 has been measured at various temperatures above and below the antiferromagnetic ordering temperature T N=52.3K. Two prominent bands at 175.2 and 270.9 cm-1 (6K) were observed at all temperatures and are assigned to the Eg and A1gk=0 optic phonons, respectively. A careful search was made for Raman peaks due to one- and two-magnon scattering at temperatures below T N but none were found. It is concluded that their intensity must be less than 1/30th the intensity of the A1g phonon. These results, coupled with earlier measurements of Raman scattering by magnons in FeCl 2, CoCl2 and CoBr2, indicate a need for theoretical investigations of the magnon-photon coupling mechanism for these highly anisotropic layered compounds.
引用
收藏
页码:3615 / 3620
页数:6
相关论文
共 34 条
[1]   MAGNETIC PROPERTIES OF FECL2 IN ZERO-FIELD .1. EXCITATIONS [J].
BIRGENEAU, RJ ;
YELON, WB ;
COHEN, E ;
MAKOVSKY, J .
PHYSICAL REVIEW B-SOLID STATE, 1972, 5 (07) :2607-+
[2]  
BIRGENEAU RJ, 1974, 1973 P INT C MAGN
[3]   DISPERSION OF ACOUSTIC PHONONS IN COCL2 [J].
CARRARA, P ;
REDOULES, JP ;
ESCRIBE, C ;
ZIEBECK, KRA .
SOLID STATE COMMUNICATIONS, 1977, 21 (09) :929-931
[4]   2-MAGNON RAMAN SCATTERING AND EXCHANGE INTERACTION IN ANTIFERROMAGNETIC KNIF3 AND K2NIF4 AND FERRIMAGNETIC RBNIF3 [J].
CHINN, SR ;
ZEIGER, HJ ;
OCONNOR, JR .
PHYSICAL REVIEW B-SOLID STATE, 1971, 3 (05) :1709-+
[5]  
CHRISTIE JH, 1971, LIGHT SCATTERING SOL, P145
[6]  
DAVIS RW, 1971, PHYS REV B, V4, P1004
[7]   ANTIFERROMAGNETIC RESONANCE IN MANGANOUS CHLORIDE [J].
DOUGLASS, DH ;
STRANDBERG, MW .
PHYSICA, 1961, 27 (01) :1-&
[8]  
Fleury P. A., 1970, International Journal of Magnetism, V1, P75
[9]   SCATTERING OF LIGHT BY 1- AND 2-MAGNON EXCITATIONS [J].
FLEURY, PA ;
LOUDON, R .
PHYSICAL REVIEW, 1968, 166 (02) :514-&
[10]   2-MAGNON LIGHT SCATTERING IN ANTIFERROMAGNETIC MNF2 [J].
FLEURY, PA ;
PORTO, SPS ;
LOUDON, R .
PHYSICAL REVIEW LETTERS, 1967, 18 (16) :658-&