Structural and magnetic properties of rare-earth doped (Sr2−xSmx)FeMoO6 compounds

✍ Scribed by Q. Zhang; G.Y. Liu; Z.F. Xu; X.M. Feng; G.H. Rao

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 394 KB
• Volume: 405
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/j.physb.2009.12.013

✦ Synopsis

Electron doped double perovskite compound (Sr 2 À x Sm x )FeMoO 6 (0 r xr 0.25) has been synthesized by solid-state reaction at high temperature. Crystal structure and magnetic properties of the compounds have been investigated by X-ray powder diffraction (XRD) and magnetic measurements. XRD revealed that all the compounds were of single phase and belonged to a I4/m lattice. The degree of cationic ordering on the B site was decreased pronouncedly by the electron doping. Different from the results of La-and Nd-doped Sr 2 FeMoO 6 , Curie temperature (T C ) of (Sr 2 À x Sm x )FeMoO 6 decreased first with the doping and then increased beyond x=0.15, indicating that steric effect was enhanced as the radius of rare-earth ions decreased. Saturation magnetization (M S ) of the compounds decreased with the doping level and anti-site (AS) concentration. Sm moment showed a considerable contribution to M S at low temperature, leading to an abrupt drop of M S between x= 0.1 and 0.15.