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Phase Diagram and Anisotropic Transport Properties of Nd1-xSrxMnO3 Crystals

Published online by Cambridge University Press:  10 February 2011

H. Kuwahara
Affiliation:
Joint Research Center for Atom Technology (JRCAT), 1–1–4 Higashi, Tsukuba, Ibaraki 305, Japan, (kuwahara@tsukuba.rd.sanyo.co.jp)
T. Okuda
Affiliation:
Joint Research Center for Atom Technology (JRCAT), 1–1–4 Higashi, Tsukuba, Ibaraki 305, Japan, (kuwahara@tsukuba.rd.sanyo.co.jp)
Y. Tomioka
Affiliation:
Joint Research Center for Atom Technology (JRCAT), 1–1–4 Higashi, Tsukuba, Ibaraki 305, Japan, (kuwahara@tsukuba.rd.sanyo.co.jp)
T. Kimura
Affiliation:
Joint Research Center for Atom Technology (JRCAT), 1–1–4 Higashi, Tsukuba, Ibaraki 305, Japan, (kuwahara@tsukuba.rd.sanyo.co.jp)
A. Asamitsu
Affiliation:
Joint Research Center for Atom Technology (JRCAT), 1–1–4 Higashi, Tsukuba, Ibaraki 305, Japan, (kuwahara@tsukuba.rd.sanyo.co.jp)
Y. Tokura
Affiliation:
Joint Research Center for Atom Technology (JRCAT), 1–1–4 Higashi, Tsukuba, Ibaraki 305, Japan, (kuwahara@tsukuba.rd.sanyo.co.jp) University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo 113, Japan
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Abstract

We have investigated electronic transport and magnetic properties of perovskite-type Nd1-x Sr x MnO3 crystals with change of controlled hole-doping level (0.30≤x≤0.80). The electronic phase diagram of Nd1-x Sr x MnO3 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.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

1. Kawano, H., Kajimoto, R., Yoshizawa, H., Tomioka, Y., Kuwahara, H., and Tokura, Y., Phys. Rev. Lett. 78, 4253 (1997).CrossRefGoogle Scholar
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Phase Diagram and Anisotropic Transport Properties of Nd1-xSrxMnO3 Crystals
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