布里渊散射研究In-BCVIG单晶的体磁振子和偶极——交换磁振子  

Magnon Light Scattering from In-BCVIG Single Crytal

作　　者：刘玉龙[1] 张昊[1] 朱恪[1] 萧季驹[2] 李泽民[2] 

机构地区：[1]中国科学院物理研究所 [2]香港城市大学物理及材料科学系

出　　处：《光散射学报》1997年第2期331-333,共3页The Journal of Light Scattering

摘　　要：布里渊散射研究Ｉｎ－ＢＣＶＩＧ单晶的体磁振子和偶极——交换磁振子刘玉龙张昊朱恪（中国科学院物理研究所北京１０００８０）萧季驹李泽民（香港城市大学物理及材料科学系香港九龙）ＭａｇｎｏｎＬｉｇｈｔＳｃａｔｅｒｉｎｇｆｒｏｍＩｎ－ＢＣＶＩＧＳｉｎｇｌｅＣｒ...Abstract The first evidence for the dipole exchange surface magnons in ferrimagnetic garnets is reported by Brillouin scattering. The crystal,{Bi 3-2x Ca 2x }, [Fe 2-y Iny](Fe 3-x V x)O 12 (x=1.14, and y=0.13), is close to the compositional compensation point of magnetization. The surface magnons, are weak but clearly discernible and show characteristic overlap with the bulk magnons. The mixing intensifies with increasing external field. The stiffness constant D of In-BCVIG determined from the dispersion relation was found to be much larger than those of YIG and Bi:YIG, and to be very sensitive to excitation power.

关 键 词：布里渊散射 In-BCVIG 晶体 磁振子 偶极交换 

分 类 号：O737[理学—晶体学] O437.2[机械工程—光学工程]