Abstract
Neutron scattering measurements show the ferromagnetic pyrochlore to display strong quasi-two-dimensional (2D) spin correlations at low temperature, which give way to long range order (LRO) under the application of modest magnetic fields. Rods of scattering along directions due to these 2D spin correlations imply a magnetic decomposition of the cubic pyrochlore system into decoupled kagome planes. A magnetic field of applied along the direction induces a transition to a 3D LRO state characterized by long-lived, dispersive spin waves. Our measurements map out a complex low temperature-field phase diagram for this exotic pyrochlore magnet.
- Received 29 January 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.227202
©2009 American Physical Society