Extended phase diagram of La_(1-x)Ca_(x)MnO_(3)by interfacial engineering  

作　　者：Kexuan Zhang Lili Qu Feng Jin Guanyin Gao Enda Hua Zixun Zhang Lingfei Wang Wenbin Wu 张可璇;屈莉莉;金锋;高关胤;华恩达;张子璕;王凌飞;吴文彬(Hefei National Laboratory for Physical Sciences at Microscale,University of Science and Technology of China,Hefei 230026,China;Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,HFIPS,Anhui,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]Hefei National Laboratory for Physical Sciences at Microscale,University of Science and Technology of China,Hefei 230026,China [2]Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,HFIPS,Anhui,Chinese Academy of Sciences,Hefei 230031,China

出　　处：《Chinese Physics B》2021年第12期136-141,共6页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China(Grant Nos.2016YFA0401003,2017YFA0403502,and2020YFA0309100);the National Natural Science Foundation of China(Grant Nos.11974326,12074365,11804342,U2032218,and 51872278);the Fundamental Research Funds for the Central Universities,China(Grant Nos.WK2030000035 and WK2340000102);Hefei Science Center of Chinese Academy of Sciences(Grant No.2020HSC-UE014)。

摘　　要：The interfacial enhanced ferromagnetism in maganite/ruthenate system is regarded as a promising path to broaden the potential of oxide-based electronic device applications.Here,we systematically studied the physical properties of La_(1-x)Ca_(x)MnO_(3)/SrRuO_(3)superlattices and compared them with the La1-x Cax MnO_(3)thin films and bulk compounds.The La_(1-x)Ca_(x)MnO_(3)/SrRuO_(3)superlattices exhibit significant enhancement of Curie temperature(TC)beyond the corresponding thin films and bulks.Based on these results,we constructed an extended phase diagram of La_(1-x)Ca_(x)MnO_(3)under interfacial engineering.We considered the interfacial charge transfer and structural proximity effects as the origin of the interfaceinduced high TC.The structural characterizations revealed a pronounced increase of B-O-B bond angle,which could be the main driving force for the high TCin the superlattices.Our work inspires a deeper understanding of the collective effects of interfacial charge transfer and structural proximity on the physical properties of oxide heterostructures.

关 键 词：interfacial engineering oxygen octahedral coupling charge transfer oxide superlattices 

分 类 号：O469[理学—凝聚态物理]