相分离稀土锰氧化物的相变调控及磁、电性质  

Manipulation of phase transition in the phase-separated manganite films

作　　者：刘瑶 马天宇 LIU Yao;MA Tianyu(Frontier Institute of Science and Technology,Xi’an Jiaotong University,Xi’an 710054,Shaanxi,China)

机构地区：[1]西安交通大学前沿科学技术研究院,陕西西安710054

出　　处：《金属功能材料》2024年第6期10-22,共13页Metallic Functional Materials

基　　金：国家自然科学基金青年基金(51901170);中国博士后基金特别资助项目(2022T150510T)。

摘　　要：稀土锰氧化物中不同序参量之间强耦合作用为外场调控其物性(如磁性、d电子轨道和电阻态等)提供了丰富的可能性。通过调控具有相分离特征的稀土锰氧化物的固态相变有望获得巨磁电耦合效应和电致阻变效应。对团队关于相分离的锰氧化物中的相变调控研究工作进行了系统的总结。通过静态晶格应变调控薄膜中的磁相变,发现各向异性晶格应变是诱导其铁磁态到反铁磁态相变的关键因素,在此基础上选取了具有(011)取向的PMN-PT衬底制备了多铁异质结,利用衬底中电场诱导的各向异性晶格应变,获得了巨磁电耦合效应和电致阻变效应。The strong coupling effect between different degrees of freedom in the rare-earth manganites supplies rich possibilities for the modulation of physical properties,such as the magnetic properties,the delectron orbitals,and resistance states.Modulating the solid-state transition in the manganites thus exhibits high potential in achieving giant magnetoelectric and electroresistance effects.Systematically reviews the group's work on the control of phase transition in the phase-separated rare-earth manganites.By introducing the static lattice strain,we have clarified that the anisotropic strain is the key to induce the antiferromagnetic transition.Following the guidance,we have chosen the(011)oriented PMN-PT as a substrate to fabricate the multiferroic heterostructures,by utilizing the electric field-induced anisotropic strain in the substrate,the authors have obtained a giant magnetoelectric effect and electroresistance.

关 键 词：稀土锰氧化物 磁电耦合 电致阻变 相分离 

分 类 号：TG1[金属学及工艺—金属学]