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Phase structure and piezoelectric properties of Ca- and Ba-doped K1/2Na1/2NbO3 lead-free ceramics
(Elsevier, 2012-10-23)
Piezoelectric lead-free ceramics, K1/2Na1/2NbO3 (KNN) modified with alkaline-earth (AE) Ca2+ and Ba2+, have been prepared by a conventional solid-state sintering technique. The effect of doping level on sinterability and ...
Effect of high energy proton irradiation on MAPbI 3 films for space applications observed by micro-Raman spectroscopy
(Royal Society of Chemistry, 2020-08)
Irradiation of samples with 10 MeV protons is a standard test for simulation of outer space environment in order to qualify devices and materials for space applications. Micro-Raman spectroscopy allows to determine the ...
Crystal growth and thermoelectric properties of CaMn0.98Nb 0.02O3-δ
(Elsevier, 2013-05-24)
Thermoelectric CaMn0.98Nb0.02O3−δ single crystals were grown from sintered polycrystalline material using the traveling-solvent floating zone (TSFZ) method. The floating-zone furnace was operated at overpressure using an ...
Reversed exchange-bias effect associated with magnetization reversal in the weak ferrimagnet LuF e0.5 C r0.5 O3
(American Physical Society, 2018-03)
The exchange-bias (EB) effect with sign reversal was found in LuFe0.5Cr0.5O3 ferrite-chromite, which is a weak ferrimagnet below TN=265K, exhibiting antiparallel orientation of the ferromagnetic (FM) moments of the Fe and ...
Structural properties and electrical conductivity of perovskite-type oxides in SOFCs
(Institute of Physics Publishing, 2019-05)
Structural properties and electrical conductivity of Sr2MgMoO6 (SMMO) and Sr2MgMo0.9TM0.1O6-δ (TM = Co, Mn) compounds were analyzed for establishing the usefulness of these materials as Solid oxide fuel cells (SOFC) anode. ...
Characterization of GdBa1 − xSrxCo2O5 + δ ( 0 ⩽ x ⩽ 1.0 ) Double Perovskites as Cathodes for Solid Oxide Fuel Cells
(Electrochemical Society, 2008-08-08)
The effect of Sr2+ substitution for Ba2+ on the crystal chemistry, oxygen content, thermal expansion, electrical conductivity, and catalytic activity for oxygen reduction reaction (ORR) of the double perovskite oxides Gd ...
Nonstoichiometry driven ferromagnetism in double perovskite La2Ni1-xMn1+ xO6 insulating thin films
(American Chemical Society, 2019-05)
In this work we report on the epitaxial growth of La2NiMnO6 double perovskite thin films on top of (001) oriented SrTiO3 substrates by RF magnetron sputtering. The influence of oxygen pressure (P O2) and growth temperature ...
La/Ba-based cobaltites as IT-SOFC cathodes: a discussion about the effect of crystal structure and microstructure on the O2-reduction reaction
(Pergamon-Elsevier Science Ltd, 2016-10)
This work discusses the effect of the crystal structure and microstructure on the electrocatalytic activity of Lanthanum-Barium cobaltite (LBC), evaluatedas IT-SOFC cathode. Two systems with similar microstructures (particle ...
Structural origin of the enhanced ionic conductivity upon Nb doping in Sr11Mo4O23 defective double perovskite
(Royal Society of Chemistry, 2017-02)
We report a substantial enhancement of the oxide-ion conductivity in Sr11Mo4O23 achieved by Nb doping the Mo sites. This series responds to the formula: Sr11Mo4−xNbxO23−δ (with x = 0.0, 0.5 and 1.0). The original structure ...
Mechano-Chemical Synthesis, Structural Features and Optical Gap of Hybrid CH3NH3CdBr3 Perovskite
(MDPI, 2021-10)
Hybrid methyl-ammonium (MA:CH3 NH3+) lead halide MAPbX3 (X = halogen) perovskites exhibit an attractive optoelectronic performance that can be applied to the next generation of solar cells. To extend the field of interest ...