Abstract
The spin dynamics of the metallic A-type antiferromagnetic manganites is studied. An effective nearest-neighbor Heisenberg spin-wave dispersion is derived from the double-exchange model taking into account the superexchange interaction between the core spins. The result of inelastic neutron-scattering experiment on (formula presented) is qualitatively reproduced. Comparing theory with experimental data, two main parameters of the model—nearest-neighbor electron-transfer amplitude and superexchange coupling between the core spins—are estimated.
| Original language | English (US) |
|---|---|
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 64 |
| Issue number | 9 |
| DOIs | |
| State | Published - 2001 |