Phase diagram and anisotropic transport properties of Nd{sub 1{minus}x}Sr{sub x}MnO{sub 3} crystals

Book · Thu Dec 31 04:00:00 EST 1998

OSTI ID:323398

Kuwahara, H; Okuda, T; Tomioka, Y; Kimura, T; Asamitsu, A ^[1]; Tokura, Y ^[1]

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1. Joint Research Center for Atom Technology, Tsukuba, Ibaraki (Japan)

The authors have investigated electronic transport and magnetic properties of perovskite-type Nd{sub 1{minus}x}Sr{sub x}MnO{sub 3} crystals with change of controlled hole-doping level (0.30 {le} x {le} 0.80). The electronic phase diagram of Nd{sub 1{minus}x}Sr{sub x}MnO{sub 3} was obtained by systematic measurements of magnetization (magnetic structure), resistivity, and lattice parameter. The authors have also studied the anisotropic 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 isotropic transport behavior has been confirmed for the CE-type AF charge-ordered state in the x = 0.50 crystal.

• OSTI ID: 323398
• Report Number(s): CONF-971201--; ISBN 1-55899-399-1
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
EXPERIMENTAL DATA
LATTICE PARAMETERS
MAGNETIC PROPERTIES
MANGANESE OXIDES
NEODYMIUM OXIDES
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE