La0.7Sr0.3MnO3-Pb（Zr,Ti）O3双层膜中的磁电（ME）效应

La_0.7Sr_0.3MnO₃-Pb（Zr,Ti）O₃双层膜中的磁电（ME）效应

摘要: 由溶胶-凝胶法制备出锰酸盐La_0.7Sr_0.3MnO₃粉料,经1300K热压并在1573K高温下烧结成块材,并与Pb(Zr,Ti)O₃胶合形成弹性耦合双层膜。相较于涂敷膜(tape casting)复合样品,该双层膜显示出更为优良的ME耦合效应。横向耦合要比纵向耦合更为强烈,并当外加磁场为150 Oe时ME电压系数达到峰值。分析表明由磁场和频率变化导致的ME系数变化的实验值与理论值符合的很好。

Abstract: Manganite La_0.7Sr_0.3MnO₃ powder was synthesized by sol-gel method.Then it was hot-pressed at 1300K and sintered at 1573K for 10 h to get bulks.Gluing La_0.7Sr_0.3MnO₃ chip with Pb（Zr,Ti）O₃,ME bilayers with elastic coupling were obtained.The bilayers exhibit superior ME coupling compared to thick film composites prepared by tape casting process.The transverse coupling is stronger than the longitudinal interactions and a maximum ME voltage coefficient is achieved under an applied field H=150 Oe.There is excellent agreement between theory and the ME data measurement.