title: Strain Engineering of Octahedral Rotations and Physical Properties of SrRuO3 Films.
abstract: Strain engineering is an effective way to modify functional properties of thin films. Recently, the importance of octahedral rotations in pervoskite films has been recognized in discovering and designing new functional phases. Octahedral behavior of SrRuO3 film as a popular electrode in heterostructured devices is of particular interest for its probable interfacial coupling of octahedra with the functional overlayers. Here we report the strain engineering of octahedral rotations and physical properties that has been achieved in SrRuO3 films in response to the substrate-induced misfit strains of almost the same amplitude but of opposite signs. It shows that the compressively strained film on NdGaO3 substrate displays a rotation pattern of a tetragonal phase whilst the tensilely strained film on KTaO3 substrate has the rotation pattern of the bulk orthorhombic SrRuO3 phase. In addition, the compressively strained film displays a perpendicular magnetic anisotropy while the tensilely strained film has the magnetic easy axis lying in the film plane. The results show the prospect of strain engineered octahedral architecture in producing desired property and novel functionality in the class of perovskite material.
authors.affiliation: 1] Department of Materials Science and Engineering, National University of Singapore, Singapore 117576 [2] Data Storage Institute, A*STAR (Agency for Science, Technology and Research), DSI Building, 5 Engineering Drive 1, Singapore 117608.
authors.forename: Wenlai
authors.initials: W
authors.lastname: Lu
authors.affiliation: Data Storage Institute, A*STAR (Agency for Science, Technology and Research), DSI Building, 5 Engineering Drive 1, Singapore 117608.
authors.forename: Wendong
authors.initials: W
authors.lastname: Song
authors.affiliation: Singapore Synchrotron Light Source (SSLS), National University of Singapore, 5 Research Link, Singapore 117603.
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.affiliation: Department of Materials Science and Engineering, National University of Singapore, Singapore 117576.
authors.forename: Jun
authors.initials: J
authors.lastname: Ding
authors.affiliation: Department of Materials Science and Engineering, National University of Singapore, Singapore 117576.
authors.forename: Gan Moog
authors.initials: GM
authors.lastname: Chow
authors.affiliation: Department of Materials Science and Engineering, National University of Singapore, Singapore 117576.
authors.forename: Jingsheng
authors.initials: J
authors.lastname: Chen