Spin dynamics in stripe-ordered
- 28 March 2003
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 67 (10), 100407
- https://doi.org/10.1103/physrevb.67.100407
Abstract
Polarized- and unpolarized-neutron inelastic scattering has been used to measure the spin excitations in the striped spin-charge-ordered phase of Above 30 meV, sharp magnetic modes are observed characteristic of a static stripe lattice. This part of the energy spectrum is described well by a linear spin-wave model with intrastripe and interstripe exchange interactions between neighboring Ni spins given by and respectively. A pronounced suppression and broadening of the magnetic fluctuations in a band between 10 meV and 25 meV is suggestive of coupling to collective motions of the stripe domain walls.
Keywords
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