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SUMMARY:Electrical control of magnetism and orbital reconstruction in oxid
 e bilayers - Dr. Cheng Song\, School of Materials Science and Engineering\
 , Tsinghua University\, China
DTSTART:20171011T131500Z
DTEND:20171011T141500Z
UID:TALK93433@talks.cam.ac.uk
CONTACT:Dr Joanna Waldie
DESCRIPTION:Electrical control of magnetism with profound physics and enor
 mous potential applications has provoked extensive research activities [1\
 ,2].\n\nIn this talk\, I will present the reversible orbital reconstructio
 n driven by ferroelectric polarization modulates the magnetic performance 
 of ferroelectric/ferromagnetic [BaTiO3/(La\,Sr)MnO3] heterostructure. In-p
 lane Mn orbital occupancy and related interfacial magnetic state are enhan
 ced and weakened by the negative and positive electric-field\, respectivel
 y [3\,4]. With the aid of ionic liquid\, the modulation of magnetism exten
 ds to bulk part of the ferromagnet. The Ti-O-Mn covalent bond at the inter
 face controls the field effect by enhancing or blocking the channel for el
 ectron injection and extraction in the bulk of film\, serving as an orbita
 l switch at atomic scale for the manipulation of magnetism [5\,6]. On the 
 other hand\, by sweeping the external voltage\, a reversible manipulation 
 of orbital reconstruction and magnetic phase transition sequence in cobalt
 ite/manganite [SrCoO3–x/(La\,Sr)MnO3–y] heterostructures will be repor
 ted [7\,8]. \n\nOur findings thus not only present a broad opportunity to 
 fill the missing member—orbital in the mechanism of electrical control o
 f magnetism\, but also make the orbits straight forward to the application
  in microelectronic device.\n\n[1] C. Song\, et al\, Prog. Mater. Sci. 87 
 33–82 (2017).\n\n[2] X. Z. Chen\, C. Song\, et al. Nature Commun. 8\, 44
 9 (2017)\n\n[3] B. Cui\, C. Song\, et al. Adv. Mater. 27\, 6651–6656 (20
 15).\n\n[4] B. Cui\, C. Song\, et al. Adv. Funct. Mater. 25\, 864–870 (2
 015).\n\n[5] B. Cui\, C. Song\, et al. Adv. Funct. Mater. 26\, 753–759 (
 2016)\n\n[6] F. Li\, C. Song\, et al. Adv. Mater. 29\, 1604052 (2017)\n\n[
 7] B. Cui\, C. Song\, et al. Phys. Rev. B 94\, 134403 (2016)\n\n[8] B. Cui
 \, C. Song\, et al. Phys. Rev. Appl. (In press)
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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