Role of B-site cation on the structure, magnetic and dielectric properties of nanosized La_0.7Sr_0.3Fe_1−xM_xO₃ (M = Mn; Co and x = 0, 0.5) perovskites

Abstract

The easiness of preparation and tailored properties of perovskite nanoparticles rendered them an important class of materials in the last decade. In this work, La 0.7 Sr 0.3 Fe 1-x M x O 3 (M=Mn, Co and x=0, 0.5) orthoferrites were synthesized using combustion method and examined using X-ray diffraction. The orthorhombic structure was clearly obvious with Pbnm space group without the need of any thermal treatment. Field emission scanning electron microscopy (FESEM) accompanied by Energy-dispersive spectroscopy studies were also performed, evidencing the similarity of both nominal and chemical compositions for the studied orthoferrites. The thermal dependence of the dielectric properties was investigated (from room temperature to 698 K) in the frequency range (70 Hz-5 MHz). Magnetic properties were investigated at room temperature and discussed.

Influence of doping concentrations of Hf on structural and electrical properties of HfxZn1-xO thin films

“…It enhances the electrical and optical properties of ZnO due to its high tenability [15] Hf-doped ZnO structures have been fabricated by different techniques. Examples of these techniques are chemical vapour deposition (CVD), physical vapour deposition (PVD), metalorganic chemical vapour deposition (MOCVD), plasma-enhanced chemical vapour deposition (PECVD), atomic layer depositions (ALD), pulsed laser deposition (PLD), atomic layer chemical vapour deposition (ALCVD), radio-frequency (RF)-magnetron sputtering, chemical bath deposition (CBD), successive ionic layer adsorption and reaction (SILAR) and sol-gel [16][17][18][19][20][21] for thin film and solid state, hydrothermal, co-precipitation, sonication, wet-chemical and sol-gel [22][23][24][25][26][27][28] for bulk materials. The Sol-gel method is one of the most common methods used in the production of nano-sized ceramic samples as well as in the production of high-quality thin films.…”