Nanostructural evidence at the phase boundary of A-and C-type antiferromagnetic phases in Nd1-xSrxMnO3 crystals

M. Nagao, T. Asaka, D. Akahoshi, R. Hatakeyama, T. Nagai, M. Saito, K. Watanabe, M. Tanaka, Atsushi Yamazaki, T. Hara, K. Kimoto, H. Kuwahara, Y. Matsui

    Research output: Contribution to journalArticle

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    Abstract

    A weak ferromagnetic phase appears around the phase boundary between the A-type and C-type antiferromagnetic phases in overdoped Nd1-xSr xMnO3 crystals (0.6≤x≤0.7). We investigated the crystal structure and the magnetic domain structure around the phase boundary, by powder synchrotron x-ray diffractometry and transmission electron microscopy. The phase boundary exists between x = 0.62 in the phase separation region where the A-type and C-type antiferromagnetic phases coexist and x = 0.625 in the C-type antiferromagnetic phase. By transmission electron microscopy, the orbital-disordered nanodomains in the C-type antiferromagnetic matrix phase were only observed in the vicinity of the phase boundary in the C-type antiferromagnetic phase. This is a nanoscale inhomogeneity but is not a conventional phase separation for manganites. We also successfully observed magnetic domain structures in the weak ferromagnetic phase by Lorentz electron microscopy. Moreover, we found that the ferromagnetic correlation becomes a short-range correlation when the orbital-disordered nanodomains appear. We consider that the orbital-disordered nanodomains interfere with the long-range ferromagnetic correlation.

    Original languageEnglish
    Article number492201
    JournalJournal of Physics Condensed Matter
    Volume19
    Issue number49
    DOIs
    Publication statusPublished - 2007 Dec 12

    Fingerprint

    Phase boundaries
    Magnetic domains
    Crystals
    magnetic domains
    orbitals
    Phase separation
    crystals
    Transmission electron microscopy
    Manganites
    transmission electron microscopy
    Synchrotrons
    Powders
    Electron microscopy
    electron microscopy
    synchrotrons
    inhomogeneity
    Crystal structure
    X rays
    crystal structure
    matrices

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Nanostructural evidence at the phase boundary of A-and C-type antiferromagnetic phases in Nd1-xSrxMnO3 crystals. / Nagao, M.; Asaka, T.; Akahoshi, D.; Hatakeyama, R.; Nagai, T.; Saito, M.; Watanabe, K.; Tanaka, M.; Yamazaki, Atsushi; Hara, T.; Kimoto, K.; Kuwahara, H.; Matsui, Y.

    In: Journal of Physics Condensed Matter, Vol. 19, No. 49, 492201, 12.12.2007.

    Research output: Contribution to journalArticle

    Nagao, M, Asaka, T, Akahoshi, D, Hatakeyama, R, Nagai, T, Saito, M, Watanabe, K, Tanaka, M, Yamazaki, A, Hara, T, Kimoto, K, Kuwahara, H & Matsui, Y 2007, 'Nanostructural evidence at the phase boundary of A-and C-type antiferromagnetic phases in Nd1-xSrxMnO3 crystals', Journal of Physics Condensed Matter, vol. 19, no. 49, 492201. https://doi.org/10.1088/0953-8984/19/49/492201
    Nagao, M. ; Asaka, T. ; Akahoshi, D. ; Hatakeyama, R. ; Nagai, T. ; Saito, M. ; Watanabe, K. ; Tanaka, M. ; Yamazaki, Atsushi ; Hara, T. ; Kimoto, K. ; Kuwahara, H. ; Matsui, Y. / Nanostructural evidence at the phase boundary of A-and C-type antiferromagnetic phases in Nd1-xSrxMnO3 crystals. In: Journal of Physics Condensed Matter. 2007 ; Vol. 19, No. 49.
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    AU - Asaka, T.

    AU - Akahoshi, D.

    AU - Hatakeyama, R.

    AU - Nagai, T.

    AU - Saito, M.

    AU - Watanabe, K.

    AU - Tanaka, M.

    AU - Yamazaki, Atsushi

    AU - Hara, T.

    AU - Kimoto, K.

    AU - Kuwahara, H.

    AU - Matsui, Y.

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    N2 - A weak ferromagnetic phase appears around the phase boundary between the A-type and C-type antiferromagnetic phases in overdoped Nd1-xSr xMnO3 crystals (0.6≤x≤0.7). We investigated the crystal structure and the magnetic domain structure around the phase boundary, by powder synchrotron x-ray diffractometry and transmission electron microscopy. The phase boundary exists between x = 0.62 in the phase separation region where the A-type and C-type antiferromagnetic phases coexist and x = 0.625 in the C-type antiferromagnetic phase. By transmission electron microscopy, the orbital-disordered nanodomains in the C-type antiferromagnetic matrix phase were only observed in the vicinity of the phase boundary in the C-type antiferromagnetic phase. This is a nanoscale inhomogeneity but is not a conventional phase separation for manganites. We also successfully observed magnetic domain structures in the weak ferromagnetic phase by Lorentz electron microscopy. Moreover, we found that the ferromagnetic correlation becomes a short-range correlation when the orbital-disordered nanodomains appear. We consider that the orbital-disordered nanodomains interfere with the long-range ferromagnetic correlation.

    AB - A weak ferromagnetic phase appears around the phase boundary between the A-type and C-type antiferromagnetic phases in overdoped Nd1-xSr xMnO3 crystals (0.6≤x≤0.7). We investigated the crystal structure and the magnetic domain structure around the phase boundary, by powder synchrotron x-ray diffractometry and transmission electron microscopy. The phase boundary exists between x = 0.62 in the phase separation region where the A-type and C-type antiferromagnetic phases coexist and x = 0.625 in the C-type antiferromagnetic phase. By transmission electron microscopy, the orbital-disordered nanodomains in the C-type antiferromagnetic matrix phase were only observed in the vicinity of the phase boundary in the C-type antiferromagnetic phase. This is a nanoscale inhomogeneity but is not a conventional phase separation for manganites. We also successfully observed magnetic domain structures in the weak ferromagnetic phase by Lorentz electron microscopy. Moreover, we found that the ferromagnetic correlation becomes a short-range correlation when the orbital-disordered nanodomains appear. We consider that the orbital-disordered nanodomains interfere with the long-range ferromagnetic correlation.

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