Solution precursor synthesis and magnetic properties of Eu1−xCaxTiO3

Investigation of europium titanate EuTiO3 obtaining process by method of Eu2O3 and TiO2 solid-phase sintering in presence of carbon

“…30. However, the bulk conductivity behaviour of x=0.2 displays the same switch in conduction mechanism as observed for some un-doped ET ceramics.…”

“…CaTiO 3 (CT) has orthorhombic symmetry at room temperature but Henderson et al [30] did not find any evidence for a phase transition from cubic (ET at room temperature) to orthorhombic (CT at room temperature) symmetry, however, it might be possible that they did not observe it due to the resolution of the instrumentation used in their experiments. In-Ga alloy.…”

“…In addition to Ba 2+ ion doping of ET, Ca 2+ , Sr 2+ and R (rare earth elements) have also been investigated and their properties reported [30].…”

“…By analysing the XRD data of ET powder,Fig 13,no extra peaks are observed and this means that single phase samples can be made using these experimental processing conditions. N. L. Henderson[30] reported single phase ET powder by a sol-gel method, a~3.902(3) Å, and a lattice parameter of ~ 3.905 Å was obtained by Matthew C.Ferrarelli in 2011 at the University of Sheffield by a solid state method (unpublished work). From Table1, it can be seen that the unit cell a is between ~ 3.905 and 3.907 Å and is somewhat dependent on the sintering temperature and time.…”

Crystal structure and magnetic properties of EuZrO3 solid solutions

“…29,36,37 The formation of solid solutions through the A-site cation substitution has been reported to modulate the lattice volume and the accompanying structural evolution of ABO 3 perovskite oxides. [38][39][40][41][42][43] The alkaline earth metal zirconates AZrO 3 (A = Ba, Ca and Sr) have different crystal structures and crystal lattice volumes at room temperature; the structure is cubic Pm% 3m for A = Ba and orthorhombic Pbnm for A = Ca and Sr. [44][45][46][47][48] Thus, the substitution of the A-site (Eu 2+ ) by group 2 elements has the potential to induce variations in lattice volume and crystal structure and to fine-tune the magnetic properties of EuZrO 3 . In this study, we aimed to qualitatively verify the theoretical prediction deduced by Akamatsu et al and reveal the underlying intrinsic mechanism of tuning the relative strengths of the competing magnetic interactions by changing the lattice volume for EuZrO 3 .…”