Crystallographic features in lightly-doped La1 - xSr xMnO3

M. Arao, T. Ueno, T. Asada, Yasumasa Koyama, C. Minamisawa, M. Mogi, Y. Inoue

    Research output: Contribution to journal › Article

    Abstract

    The crystallographic features of the simple perovskite oxides La 1-xSrxMnO3 with 0≤x≤0.08, which are known to be correlated-electron insulators, have been examined by X-ray powder diffraction and transmission electron microscopy. It was confirmed on the basis of the powder diffraction profiles obtained that the orthorhombic-to-monoclinic structural phase transition took place; for instance, at 500 K in the x=0.08 sample. The profiles also indicated that the structural transition accompanied the introduction of the Jahn-Teller distortion and the increase in both the orthorhombic distortion and the A-site-ion displacement. Based on the reciprocal lattices determined from electron diffraction patterns, further, it was found that these distortions and displacement never resulted in the change in the extinction rule of diffraction spots, and that the monoclinic distortion was actually involved in the low-temperature phase. That is, the structural phase transition can basically be regarded as a ferroelastic transition in terms of the lowering of the symmetry.

    Original languageEnglish
    Pages (from-to)171-177
    Number of pages7
    JournalPhysica C: Superconductivity and its Applications
    Volume412-414
    Issue numberSPEC. ISS.
    DOIs
    Publication statusPublished - 2004 Oct

    Fingerprint

    Phase transitions
    Jahn-Teller effect
    diffraction
    Electron transitions
    Electron diffraction
    Perovskite
    X ray powder diffraction
    Oxides
    Diffraction patterns
    profiles
    Diffraction
    Ions
    Transmission electron microscopy
    extinction
    diffraction patterns
    electron diffraction
    Electrons
    insulators
    transmission electron microscopy
    oxides

    Keywords

    • Jahn-Teller lattice distortion
    • LaSr MnO
    • Powder X-ray diffraction
    • Structural phase transition
    • Transmission electron microscopy

    ASJC Scopus subject areas

    • Condensed Matter Physics

    Cite this

    Arao, M., Ueno, T., Asada, T., Koyama, Y., Minamisawa, C., Mogi, M., & Inoue, Y. (2004). Crystallographic features in lightly-doped La1 - xSr xMnO3 Physica C: Superconductivity and its Applications, 412-414(SPEC. ISS.), 171-177. https://doi.org/10.1016/j.physc.2003.11.070

    Crystallographic features in lightly-doped La1 - xSr xMnO3 . / Arao, M.; Ueno, T.; Asada, T.; Koyama, Yasumasa; Minamisawa, C.; Mogi, M.; Inoue, Y.

    In: Physica C: Superconductivity and its Applications, Vol. 412-414, No. SPEC. ISS., 10.2004, p. 171-177.

    Research output: Contribution to journal › Article

    Arao, M, Ueno, T, Asada, T, Koyama, Y, Minamisawa, C, Mogi, M & Inoue, Y 2004, 'Crystallographic features in lightly-doped La1 - xSr xMnO3 ', Physica C: Superconductivity and its Applications, vol. 412-414, no. SPEC. ISS., pp. 171-177. https://doi.org/10.1016/j.physc.2003.11.070
    Arao M, Ueno T, Asada T, Koyama Y, Minamisawa C, Mogi M et al. Crystallographic features in lightly-doped La1 - xSr xMnO3 Physica C: Superconductivity and its Applications. 2004 Oct;412-414(SPEC. ISS.):171-177. https://doi.org/10.1016/j.physc.2003.11.070
    Arao, M. ; Ueno, T. ; Asada, T. ; Koyama, Yasumasa ; Minamisawa, C. ; Mogi, M. ; Inoue, Y. / Crystallographic features in lightly-doped La1 - xSr xMnO3 In: Physica C: Superconductivity and its Applications. 2004 ; Vol. 412-414, No. SPEC. ISS. pp. 171-177.
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    abstract = "The crystallographic features of the simple perovskite oxides La 1-xSrxMnO3 with 0≤x≤0.08, which are known to be correlated-electron insulators, have been examined by X-ray powder diffraction and transmission electron microscopy. It was confirmed on the basis of the powder diffraction profiles obtained that the orthorhombic-to-monoclinic structural phase transition took place; for instance, at 500 K in the x=0.08 sample. The profiles also indicated that the structural transition accompanied the introduction of the Jahn-Teller distortion and the increase in both the orthorhombic distortion and the A-site-ion displacement. Based on the reciprocal lattices determined from electron diffraction patterns, further, it was found that these distortions and displacement never resulted in the change in the extinction rule of diffraction spots, and that the monoclinic distortion was actually involved in the low-temperature phase. That is, the structural phase transition can basically be regarded as a ferroelastic transition in terms of the lowering of the symmetry.",
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    AU - Mogi, M.

    AU - Inoue, Y.

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    AB - The crystallographic features of the simple perovskite oxides La 1-xSrxMnO3 with 0≤x≤0.08, which are known to be correlated-electron insulators, have been examined by X-ray powder diffraction and transmission electron microscopy. It was confirmed on the basis of the powder diffraction profiles obtained that the orthorhombic-to-monoclinic structural phase transition took place; for instance, at 500 K in the x=0.08 sample. The profiles also indicated that the structural transition accompanied the introduction of the Jahn-Teller distortion and the increase in both the orthorhombic distortion and the A-site-ion displacement. Based on the reciprocal lattices determined from electron diffraction patterns, further, it was found that these distortions and displacement never resulted in the change in the extinction rule of diffraction spots, and that the monoclinic distortion was actually involved in the low-temperature phase. That is, the structural phase transition can basically be regarded as a ferroelastic transition in terms of the lowering of the symmetry.

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    KW - LaSr MnO

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    KW - Transmission electron microscopy

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