Curie temperature enhancement in the double perovskite Sr2−La FeMoO6 system: An experimental study

Effects of neodymium doping on the structural and magnetic properties of the double perovskite Sr2−yNdyFe1+xMo1−xO6 compound

“…Among them, the compounds Sr 2 FeReO 6 and Sr 2 FeMoO 6 have a fairly high T C around 450 K, 1,8,9 the Sr 2 CrReO 6 compound has a higher Curie temperature of 635 K. 10 Experimental results on SFMO have shown that a substantial increase of T C can be observed by increasing the number of conduction electrons resulting from the substitution of divalent Sr 2+ by trivalent La 3+ in the Sr 2 FeMoO 6 system. 11,12 Associated to this increase of T C with the introduction of La 3+ an important amount of disorder is induced on Fe and Mo sites, which reduce the magnetization of the SFMO system. However, recent results show that the La-doped system becomes magnetically unstable when it is over doped, giving rise to a decrease of the Curie temperature.…”

Innovative Methodology for the Synthesis of CoFe2O4 Encapsulated La2Fe2O6 Nanoparticles for their Use in Various Applications.

“…Consequently, the B positions can be occupied either by Fe 2+ or Fe 3+ cations. Besides, the presence of Fe 2+ is identi ed by feature peaks that are detected for S1, S2, and S3 at 716.57 ,716.23and 716.53 respectively are corresponding to the presence of Fe 2+ cation [28][29][30]. The high-resolution Co 2p spectrum, depicted in Fig.…”

Structural phase transition and variation of magnetoresistance in the stoichiometric double perovskite Sr2−Nd Fe1+Mo1−O6 (0.05 ≤ y ≤ 0.45 and x = y/2)

“…The T C associated to the double perovskite SFMO can * Electronic address: baguilar@iim.unam.mx be increased when this compound is doped with trivalent atoms, such as La 3+ [15,16] or Nd 3+ [17]. However, anti-site defects induced by the above doping reduce the spin polarization, the saturation magnetization and the magnetoresistance [15][16][17]. The influence of Nd doping on the electronic and magnetic properties of the off-stoichiometric SFMO double perovskite was previously reported [17][18][19].…”