Structural properties of Pb2MnW1−xRexO6double perovskites

Structural, Magnetic and Catalytic Properties of Non-Stoichiometric Lanthanum Ferrite Nano-Perovskites in Carbon Monoxide Oxidation

Perovskite-type oxides of LaFe(1+x)O(3+δ) (x = 0.0, 0.2, 0.5 and 0.7) were synthesized by citrate sol–gel methodto ensure the formation of nanosized perovskites. The physicochemical properties of these LaFe(1+x)O(3+δ)materials were characterized by thermal gravimetric/differential analyses, Fourier transform infraredspectroscopy, X-ray powder diffraction, scanning electron and...

Structural, electric, and magnetic properties of Mn perovskites

Recently, the interesting electric or magnetic properties such as high-Tc superconductivity and colossal magnetoresistance bring forth intense interests in transition metal oxides with perovskite structure in the field. Those interesting properties originate in the strong couplings among charge, spin, orbital, and lattice degrees of freedom. More various novel and complex phase transitions can ...

Structural Characterization of New Perovskites

Magnetic Properties of Cuprate Perovskites

The magnetic susceptibility of underdoped yttrium and lanthanum cuprates is interpreted based on the self-consistent solution of the t-J model of a Cu-O plane. The calculations reproduce correctly the frequency dependencies of the susceptibility in YBa2Cu3O7−y and La2−xSrxCuO4 attributing their dissimilarity to the difference in the damping of spin excitations. In YBa2Cu3O7−y these excitations ...

Competing structural instabilities in cubic perovskites.

We study the antiferrodistortive instability and its interaction with ferroelectricity in cubic perovskite compounds. Our first-principles calculations show that coexistence of both instabilities is very common. We develop a firstprinciples scheme to study the thermodynamics of these compounds when both instabilities are present, and apply it to SrTiO3. We find that increased pressure enhances ...