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.
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)
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)。
