CAJ | 학술논문

以室温下弛豫铁电单晶0.70Pb(Mg_(1/3)Nb_(2/3))O_3-0.30PbTiO_3(PMN-30%PT)的材料参数为基础,研究了该晶体沿[001]c极化情况下,不同切型的声表面波传播特性.研究发现,X-切型的PMN-30%PT单晶是一种具有低相速度和高机电耦合系数的材料,同时存在许多能流角为零的传播方向,综合来看,X-切型的127°左右方向是声表面波的最佳传播方向.
이실온하이예철전단정0.70Pb(Mg_(1/3)Nb_(2/3))O_3-0.30PbTiO_3(PMN-30%PT)적재료삼수위기출,연구료해정체연[001]c겁화정황하,불동절형적성표면파전파특성.연구발현,X-절형적PMN-30%PT단정시일충구유저상속도화고궤전우합계수적재료,동시존재허다능류각위령적전파방향,종합래간,X-절형적127°좌우방향시성표면파적최가전파방향.
Surface acoustic wave (SAW) properties of relaxor-based 0.70Pb(Mg_(1/3)Nb_(2/3))O_3-0.30PbTiO_3 (PMN-30%PT) ferroelectric single crystals poled along[001]c cubic direction has been analyzed theoretically.It can be found that X-cut PMN-30%PT single crystal is a kind of material with low phase velocity and high electromechanical coupling coefficient,besides the single crystal possess some propagation directions with zero power flow angle (PFA).The results are based on the material parameters at room temperature.Theoretical results indicate that the direction about 127° canted from[001]c is the optimum direction for the X-cut[001]c poled PMN-30%PT single crystal in SAW device applications.SAW characteristic curves were also obtained for Y-cut and Z-cut PMN-30%PT single crystals.