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Title: The electronic and magnetic properties of La{sub 0.85}Zr{sub 0.15}MnO{sub 3} deposited on SrTiO{sub 3} and MgO substrates

The electronic and magnetic properties of tetravalent-ion-doped La{sub 0.85}Zr{sub 0.15}MnO{sub 3} (LZMO) thin films that were epitaxially grown on SrTiO{sub 3} (STO) and MgO substrates were studied using temperature-dependent x-ray diffraction (XRD), x-ray absorption near-edge structure, x-ray linear dichroism, and x-ray magnetic circular dichroism at the Mn L{sub 3,2}- and K-edge. XRD studies reveal that the LZMO thin films have compressive and tensile strains (along the c-axis) on the STO and MgO substrates, respectively. As the temperature is reduced from room temperature to below magnetic transition temperature, the preferentially occupied Mn majority-spin e{sub g} orbital changes from the in-plane d{sub x}{sup 2}{sub -y}{sup 2} to the out-of-plane d{sub 3z}{sup 2}{sub -r}{sup 2} orbital for LZMO/STO, and vice versa for LZMO/MgO. Experimental results suggest that the new hopping path that is mediated by the Mn{sup 2+} ions triggers a stronger d{sub 3z}{sup 2}{sub -r}{sup 2} orbital ordering of Mn{sup 3+} ions and enhances the ferromagnetic coupling between the Mn spin moments of t{sub 2g} electrons in LZMO/STO, whereas the strong tensile strain stabilizes the d{sub x}{sup 2}{sub -y}{sup 2} orbital by inducing lattice distortions of the MnO{sub 6} octahedra in LZMO/MgO.
Authors:
 [1] ;  [2] ; ; ; ; ; ; ; ;  [1] ; ; ; ;  [3] ;  [4] ;  [5]
  1. Department of Physics, Tamkang University, Tamsui 251, Taiwan (China)
  2. (India)
  3. National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan (China)
  4. Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan (China)
  5. Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan (China)
Publication Date:
OSTI Identifier:
22304007
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ABSORPTION; CRYSTAL STRUCTURE; DOPED MATERIALS; ELECTRICAL PROPERTIES; EPITAXY; LANTHANUM COMPOUNDS; MAGNESIUM OXIDES; MAGNETIC CIRCULAR DICHROISM; MAGNETIC PROPERTIES; MANGANATES; MANGANESE IONS; MANGANESE OXIDES; STRONTIUM TITANATES; SUBSTRATES; TEMPERATURE DEPENDENCE; THIN FILMS; TRANSITION TEMPERATURE; X RADIATION; X-RAY DIFFRACTION; ZIRCONIUM COMPOUNDS