title: Turning antiferromagnetic Sm(0.34)Sr(0.66)MnO3 into a 140 K ferromagnet using a nanocomposite strain tuning approach.
abstract: Ferromagnetic insulating thin films of Sm(0.34)Sr(0.66)MnO3 (SSMO) on (001) SrTiO3 substrates with a T(C) of 140 K were formed in self-assembled epitaxial nanocomposite thin films. High T(C) ferromagnetism was enabled through vertical epitaxy of the SSMO matrix with embedded, stiff, ∼40 nm Sm2O3 nanopillars giving a c/a ratio close to 1 in the SSMO. In contrast, bulk and single phase SSMO films of the same composition have much stronger tetragonal distortion, the bulk having c/a >1 and the films having c/a <1, both of which give rise to antiferromagnetic coupling. The work demonstrates a unique and simple route to creating ferromagnetic insulators for spintronics applications where currently available ferromagnetic insulators are either hard to grow and/or have very low T(C).
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK. jld35@cam.ac.uk.
authors.forename: Ady
authors.initials: A
authors.lastname: Suwardi
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK. jld35@cam.ac.uk.
authors.forename: Bhagwati
authors.initials: B
authors.lastname: Prasad
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK. jld35@cam.ac.uk.
authors.forename: Shinbuhm
authors.initials: S
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK. jld35@cam.ac.uk.
authors.forename: Eun-Mi
authors.initials: EM
authors.lastname: Choi
authors.affiliation: Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX77843, USA.
authors.forename: Wenrui
authors.initials: W
authors.lastname: Zhang
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX77843, USA.
authors.forename: Leigang
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK. jld35@cam.ac.uk.
authors.forename: Mark
authors.initials: M
authors.lastname: Blamire
authors.affiliation: Center for Integrated Nanotechnologies (CINT), Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Quanxi
authors.initials: Q
authors.lastname: Jia
authors.affiliation: Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX77843, USA.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wang
authors.affiliation: Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634.
authors.forename: Kui
authors.initials: K
authors.lastname: Yao
authors.affiliation: Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK. jld35@cam.ac.uk.
authors.forename: Judith L
authors.initials: JL
authors.lastname: MacManus-Driscoll