We report an emission Mössbauer study of the ferromagnetic metal (Formula presented) where a few parts-per-million of Mn are replaced by (Formula presented) The behavior observed is dramatically different than that for a conventional ferromagnet. The data give strong evidence for an anomalous gradual crumbling of the ferromagnetic order, and the formation of spin clusters below as well as above the Curie temperature (Formula presented) Application of a magnetic field, even well above (Formula presented) results in a dramatic coalescence of small spin clusters into larger clusters with more ordered spins. The cluster size is found to be strongly dependent on the magnitude of the applied field.
|Number of pages||6|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 1999|
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics