Anisotropic spin waves in a metallic antiferromagnet Nd{sub 0.45}Sr{sub 0.55}MnO{sub 3}

Journal Article · Wed Jul 01 04:00:00 EDT 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.58.R571· OSTI ID:638791

Yoshizawa, H ^[1]; Kawano, H ^[2]; Fernandez-Baca, J A ^[3]; Kuwahara, H ^[4]; Tokura, Y ^[4]

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1. Neutron Scattering Laboratory, I. S. S. P., University of Tokyo, Tokai, Ibaraki 319-1106 (Japan)
2. The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-01 (Japan)
3. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
4. Joint Research Center for Atom Technology (JRCAT), Tsukuba, Ibaraki 305 (Japan)

We demonstrate that Nd{sub 0.45}Sr{sub 0.55}MnO{sub 3} is an example of a metallic antiferromagnetic manganite, and that it exhibits very anisotropic spin-wave dispersion relations with intra- and interplanar exchange parameters 8JS=32.6{plus_minus}0.9thinspmeV and 4J{sup {prime}}S={minus}10.1{plus_minus}0.5thinspmeV, respectively. This anisotropy reflects underlying d{sub x{sup 2}{minus}y{sup 2}}-type orbital ordering, and the metallic behavior indicates that a charge ordering is decoupled from the orbital ordering in this system. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 638791
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 58; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ANTIFERROMAGNETIC MATERIALS
ANTIFERROMAGNETISM
COUPLING
DISPERSION RELATIONS
ELECTRIC CONDUCTIVITY
EXCHANGE INTERACTIONS
MAGNETIC PROPERTIES
MAGNETS
MANGANESE OXIDES
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
PARAMAGNETISM
SPIN WAVES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE