Orbital-ordering-induced anomalous softening of the ferromagnetic spin waves in perovskite manganites
Abstract
Spin wave excitations were measured in the ferromagnetic phase of Nd1/2Sr1/2MnO3 by neutron scattering. This compound is located in proximity to the A-type antiferromagnetic state, and it shows a clear anisotropy and anomalous softening of the spin wave excitations. The softening in the ferromagnetic phase is induced by the orbital ordering.
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