Influence of the rare earth cation (Ln=La, Nd, Sm) on the properties of the Ln0.44Ho0.11Sr0.45MnO3±δ manganite oxides

Influence of type of precursors on the sol-gel synthesis of the LaCoO3 nanoparticles

“…In order to obtain the best properties and due to their ability to be both electronic and ionic conductors, the synthesis of these compounds was attempted by several methods. 3,4,[12][13][14] Grice et al 15 tested the catalytic activity of mixed cobaltite by the decomposition rate of hydrogen peroxide and applied this property for aqueous oxidations of organic molecules using H 2 O 2 as oxidant.…”

Structure, spin glass, and spin state in perovskite GdCo/sub 1-x/Mn/sub x/O/sub 3/ (x /spl les/ 0.5)

“…Recently, spin glass states have also been widely observed in a number of REMO perovskite ( rare-earth, 3d transition metal) compounds whose structures and magnetic properties are sensitive to the doping effect on either RE or M sites. In particular, REMn Co O perovskites exhibited very interesting paramagnetic, meta-magnetism [1], and ferromagnetism depending on the size [2]- [6]. Very recently, a typical spin glass behavior has been observed in peroviskite GdCo Mn O with very sharp transition width of 1 K at 115 K [7] and also observed in YbMn0 Co O [8] and LaMn Co O [9] sintered in two steps in air: first sintered at 900 C for 12 h, then they were crushed, mixed and re-palletized, and re-sintered at 1200 C for another 12 h.…”