Abstract
We present the results of a neutron powder-diffraction study on We show that, contrary to previous reports, a first-order structural transition occurs as a function of both x and T. Spin-state transitions occur as a function of x, T as indicated by the changes in cell volume, with evidence of a macroscopically inhomogeneous spin-state mixture at The magnetic behavior generally parallels that of with evidence for both spin-glass behavior and ferromagnetism.
- Received 19 June 2003
DOI:https://doi.org/10.1103/PhysRevB.69.054401
©2004 American Physical Society