Abstract
Neutron diffraction measurements on a single crystal of reveal a complex series of magnetic transitions at low temperature. At K, there is a transition from a paramagnetic state at higher temperature to an incommensurate magnetic structure characterized by a magnetic propagation vector (0 0 with and the magnetic moment along the a axis of the orthorhombic unit cell. Below K, the magnetic structure locks in to a commensurate structure with and the magnetic moment remains along the a axis. Below K, we find additional half-integer and integer indexed magnetic Bragg peaks consistent with a second commensurately ordered antiferromagnetic state.
1 More- Received 25 August 2014
- Revised 1 October 2014
DOI:https://doi.org/10.1103/PhysRevB.90.134423
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