Abstract
We report a comprehensive study on the correlations of structural, magnetic, and electronic properties of Y substituted double perovskite La2-xYxCoMnO6 (0 ≤ x ≤ 0.3) compounds. The Rietveld refined X-ray diffraction patterns reveal that all synthesized compounds crystallize in monoclinic structure with the P21/n space group. Raman spectra affirm the presence of well-defined bands, assigned to the double perovskite structure. The temperature dependence of electrical resistivity indicates the semiconducting nature of the compounds without any transition and is effectively probed by Variable range hopping model. The application of a magnetic field suppresses the resistivity to exhibit significant low-temperature magnetoresistance. The paramagnetic to ferromagnetic transition temperature (Tc) decreased but saturation/remnant magnetization increased with increasing Y doping. The effective magnetic moments determined by the Curie-Weiss law show a decrease in the Y concentration. The substitution of iso-valent Y at the La site induces structural compression which is strongly correlated to the enhancement of effective magnetization values.
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