摘要
为研究LiNbO3晶体中Zn2+浓度对拉曼光谱的影响,以及Zn2+在LiNbO3晶体中的占位和Zn∶LiNbO3晶体的结构,分别在LiNbO3中掺进摩尔分数为0.02、0.04、0.06、0.08ZnO的Zn∶LiNbO3晶体,进行其A1(To)和E(To)模的拉曼光谱测试.结果表明,当掺杂ZnO的摩尔分数小于0.06时,拉曼光谱变化不大,当掺杂ZnO的摩尔分数大于8%时,晶体拉曼光谱的274cm-1峰变得模糊,E(To)模也混入A1(To)模中,晶体峰值变化较大.
The Zn∶LiNbO_3 Crystals were made by mixing ZnO separately into LiNbO_3 with Moore fraction (0.02、)0.04、0.06、0.08. The construct of Zn∶LiNbO_3 Crystals and its Raman Spectrum as well as the distribution of the Zn^(2+) were investigated in order to know the effect by the concentration of Zn^(2+). The results show clearly that the Raman Spectrum changed little when the density was under 0.06; while above 0.08 the Raman Spectrum became faint at the peak of 274 cm^(-1)and E (To) module was interfused into A_1(To) simultaneously; the peak value of Zn∶LiNbO_3 Crystals changed obviously. The reasons are that the normal Nb inside of crystal lattice did not change, and Zn^(2+) just replaced the Li and the Nb on the normal Li. When the concentration of ZnO exceeded 0.08, to NbO_6 occurred aberration at eight surfaces, Zn^(2+) began to replace Nb^(5+), Zn∶LiNbO_3Crystals construction began to change.
出处
《材料科学与工艺》
EI
CAS
CSCD
2004年第2期202-204,共3页
Materials Science and Technology
