Temperature dependences of linear and nonlinear dielectric,elastic and electromechanical responses in K_(1-x)(NH_(4))_(x)H_(2)PO_(4)(x≈0.19 and 0.24)single crystals have been studied within temperature range 10–300 ...Temperature dependences of linear and nonlinear dielectric,elastic and electromechanical responses in K_(1-x)(NH_(4))_(x)H_(2)PO_(4)(x≈0.19 and 0.24)single crystals have been studied within temperature range 10–300 K.It was found near linear relations between dielectric permittivity(ε_(33)),elastic compliance(S_(6))and piezoelectric constant(d_(36)).Different behavior of elastic and dielectric nonlinear responses was revealed in the crystals undergoing ferroelectric phase transitions and transition to relaxor state.Obtained temperature dependences of nonlinear permittivity and elastic compliance are discussed in the framework of Random Field model.展开更多
基金supported by Russian Foundation for Basic Research(Grant N 13-02-90473-a)。
文摘Temperature dependences of linear and nonlinear dielectric,elastic and electromechanical responses in K_(1-x)(NH_(4))_(x)H_(2)PO_(4)(x≈0.19 and 0.24)single crystals have been studied within temperature range 10–300 K.It was found near linear relations between dielectric permittivity(ε_(33)),elastic compliance(S_(6))and piezoelectric constant(d_(36)).Different behavior of elastic and dielectric nonlinear responses was revealed in the crystals undergoing ferroelectric phase transitions and transition to relaxor state.Obtained temperature dependences of nonlinear permittivity and elastic compliance are discussed in the framework of Random Field model.
