CAJ | 학술논문

在弹性力学模型下，推导非理想耦合状态的磁电（ME）电压系数公式。利用CoFe2 O4（CFO）随磁场变化的磁致伸缩特性，得到Pb（Mg1/3Nb2/3）O3-PbTiO3（PMN -PT）与CFO复合材料的磁电电压系数随磁场以及各参量的变化关系公式。研究了磁电电压系数在磁场下随磁场强度、压电相体积分数 v、界面耦合系数 k以及PM N-PT介电常数之间的变化关系。研究结果发现：磁电电压系数随PM N-PT体积分数和磁场强度的增大，表现为先增大，后逐渐减小至零；磁电电压系数强烈地依赖于界面耦合系数，耦合系数减小会极大降低复合材料的磁电效应；同时，磁电效应具有一定的频率特性，随着频率的逐渐增大而增大，直至达到稳定。
재탄성역학모형하，추도비이상우합상태적자전（ME）전압계수공식。이용CoFe2 O4（CFO）수자장변화적자치신축특성，득도Pb（Mg1/3Nb2/3）O3-PbTiO3（PMN -PT）여CFO복합재료적자전전압계수수자장이급각삼량적변화관계공식。연구료자전전압계수재자장하수자장강도、압전상체적분수 v、계면우합계수 k이급PM N-PT개전상수지간적변화관계。연구결과발현：자전전압계수수PM N-PT체적분수화자장강도적증대，표현위선증대，후축점감소지령；자전전압계수강렬지의뢰우계면우합계수，우합계수감소회겁대강저복합재료적자전효응；동시，자전효응구유일정적빈솔특성，수착빈솔적축점증대이증대，직지체도은정。
In terms of elasticity mechanical theory model ,the magnetoelectric voltage coefficient formula is estab-lished ,using the magnetostrictive properties of CoFe2 O4 (CFO) in the magnetic field ,we obtain the changing re-lations of Pb(Mg1/3 Nb2/3 ) O3 -PbTiO3 (PMN-PT )/CFO magnetoelectric voltage coefficient changing with the magnetic field and other parameters .The magnetoelectric voltage coefficient is also studied as the function of the Magnetic field intensity 、PMN-PT volume fraction v、interface coupling coefficient k and PMN -PT dielectric constant in magnetic field .The results show that the magnetoelectric voltage coefficient increase firstly ,then gradually decreases to zero with the increase of PMN -PT volume fraction and magnetic intensity ;the magneto-electric voltage coefficient strongly depends on the interface coupling coefficient ,which will largely reduce mag-netoelectric effect ;Meanwhile ,Magnetoelectric effect has a certain frequency characteristic ,with the increase of frequency ,which increase gradually and reaches stability .