Anisotropic spin waves in a metallic antiferromagnet
H Yoshizawa, H Kawano, JA Fernandez-Baca… - Physical Review B, 1998 - APS
Physical Review B, 1998•APS
Abstract We demonstrate that Nd 0.45 Sr 0.55 MnO 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 8 JS= 3 2. 6±0.9 meV and 4 J′
S=− 10.1±0.5 meV, respectively. This anisotropy reflects underlying dx 2− y 2-type orbital
ordering, and the metallic behavior indicates that a charge ordering is decoupled from the
orbital ordering in this system.
antiferromagnetic manganite, and that it exhibits very anisotropic spin-wave dispersion
relations with intra-and interplanar exchange parameters 8 JS= 3 2. 6±0.9 meV and 4 J′
S=− 10.1±0.5 meV, respectively. This anisotropy reflects underlying dx 2− y 2-type orbital
ordering, and the metallic behavior indicates that a charge ordering is decoupled from the
orbital ordering in this system.
Abstract
We demonstrate that Nd 0.45 Sr 0.55 MnO 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 8 J S= 3 2. 6±0.9 meV and 4 J′ S=− 10.1±0.5 meV, respectively. This anisotropy reflects underlying d x 2− y 2-type orbital ordering, and the metallic behavior indicates that a charge ordering is decoupled from the orbital ordering in this system.
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