Single crystals of the disordered perovskite-type Sr(Fe0.766W0.234)O3 have been grown from a flux of SrCl2. The crystals grew with a cubical habit with distinct (100) faces. Magnetic measurements indicated antiferromagnetic behavior or weak-ferromagnetic one with very small spontaneous magnetization (∼0.028 emu/g). The existence of Fe4+ was suggested by the Mössbauer technique. The Néel temperature is 193 K. The differences of structural, magnetic properties and Mössbauer effect between Sr(Fe0.766W0.234)O3 and Sr(Fe2/3W1/3)O3 are generally explained by assigning the valence states of the two samples as Sr(Fe3+0.468Fe4+0.298W6+0.234)O3 and Sr(Fe3+1/3W6+2/3)O3 respectively.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)