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Phase Diagram and Anisotropic Transport Properties of Nd1-xSrxMnO3 Crystals

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Abstract

We have investigated electronic transport and magnetic properties of perovskite-type Nd1-xSrxMnO3 crystals with change of controlled hole-doping level (0.30≤x≤0.80). The electronic phase diagram of Nd1-xSrxMnO3 was obtained by systematic measurements of magnetization (magnetic structure), resistivity, and lattice parameter. We have also studied the anisotropie transport properties of x=0.50 and 0.55 crystals with different magnetic structures: CE-type antiferromagnetic (AF) structure for x=0.50 and A-type layered AF one for x=0.55. In the case of the x=0.55 crystal, the metallic behavior was observed within the ferromagnetic (F) layers, while along the AF-coupling direction the crystal remains insulating over the whole temperature region. The observed large anisotropy is due to the magnetic as well as orbital-ordering induced confinement of the spin-polarized carriers within the F sheets. The nearly isotropie transport behavior has been confirmed for the CE-type AF charge-ordered state in the x=0.50 crystal.

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Acknowledgement

The authors would like to thank R. Kajimoto, H. Kawano, and H. Yoshizawa for neutron scattering measurements, and N. Nagaosa for helpful discussions. The present work, partly supported by NEDO, was performed in the Joint Research Center for Atom Technology (JRCAT) under the joint research agreement between the National Institute for Advanced Interdisciplinary Research (NAIR) and the Angstrom Technology Partnership (ATP).

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Authors and Affiliations

  1. Joint Research Center for Atom Technology (JRCAT), 1-1-4 Higashi, Tsukuba, Ibaraki, 305, Japan

    H. Kuwahara, T. Okuda, Y. Tomioka, T. Kimura, A. Asamitsu & Y. Tokura

  2. University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113, Japan

    Y. Tokura

Authors
  1. H. Kuwahara
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  2. T. Okuda
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  3. Y. Tomioka
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  4. T. Kimura
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  5. A. Asamitsu
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  6. Y. Tokura
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Correspondence to H. Kuwahara.

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Kuwahara, H., Okuda, T., Tomioka, Y. et al. Phase Diagram and Anisotropic Transport Properties of Nd1-xSrxMnO3 Crystals. MRS Online Proceedings Library 494, 83–88 (1997). https://doi.org/10.1557/PROC-494-83

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  • DOI: https://doi.org/10.1557/PROC-494-83

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