Neutron powder diffraction studies of the La0.65Pb0.35MnO3 perovskite

Physical properties of La1−xPbxMnO3 perovskites with 0.24≤x≤0.40

“…A reorientation transition of the manganese spins, below T C , was also shown in La 0.65 Pb 0.35 MnO 3 thin films by ferromagnetic resonance [25]. The degree of spin misalignment influences the T M values.…”

“…When La 0.65 Pb 0.35 MnO 3 sample approaches to Curie temperature, the Mn 3+ octahedra become locally JT active and the Mn spins are canted at an average angle with respect to the c-axis, corresponding to R 3c-type structure [25]. A reorientation transition of the manganese spins, below T C , was also shown in La 0.65 Pb 0.35 MnO 3 thin films by ferromagnetic resonance [25].…”

“…The rhombohedral R 3c type structure can only accommodate MnO 6 octahedra with one Mn-O bond length and thus do not allow the presence of JT distortions. By neutron diffractions studies [24,25] was shown that the local atomic structure deviates from the average structure. The orientations of the local JT distortions vary from site to site and thus the symmetry can be maintained on the average [25].…”

“…By neutron diffractions studies [24,25] was shown that the local atomic structure deviates from the average structure. The orientations of the local JT distortions vary from site to site and thus the symmetry can be maintained on the average [25]. By electron spin resonance, a decrease of lattice distortion, at Mn site, was shown when increasing Pb 2+ content [26].…”

A Surface Insulator-to-Conductor Phase Transition in Colossal Magnetoresistive Manganese Perovskites Thin Films

“…It has been shown that this thermal treatment completely changes the surface and selvedge structure in both La 0.65 Sr 0.35 MnO 3 [5] and La 0.65 Pb 0.35 MnO 3 [6] thin films. Compare to the well-known bulk structure [7], these annealed surfaces go through a restructuring transition characterized by the formation of a Ruddlesden-Popper phase (La 1-x D x ) 2 MnO 4 (D = Sr, Pb) with a possibly embedded MnO columnar phase.…”