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

Journal Article · Sat Jun 21 00:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4884230· OSTI ID:22304007

Deshpande, N. G. ^[1]; Weng, C. H.; Wang, Y. F.; Shao, Y. C.; Cheng, C. Q.; Hsueh, H. C.; Du, C. H.; Tsai, H. M.; Pao, C. W.; Lin, H. J.; Lee, J. F. ^[2]; Chiou, J. W. ^[3]; Tsai, M. H. ^[4]

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1. Department of Physics, Tamkang University, Tamsui 251, Taiwan (China)
2. National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan (China)
3. Department of Applied Physics, National University of Kaohsiung, Kaohsiung 811, Taiwan (China)
4. Department of Physics, National Sun Yat-Sen University, Kaohsiung 804, Taiwan (China)

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.

• OSTI ID: 22304007
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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