Abstract
Structural, magnetic and magneto transport properties of Pr0.67Ca0.33FexMn1−xO3 with 0⩽x⩽0.3 nanopowder samples have been investigated. Powder samples have been elaborated by sol–gel method. Rietveld analysis of powder X-ray diffraction show that the samples crystallise in the orthorhombic perovskite system with Pnma space group. The average crystallite size of 50nm was obtained by X-ray diffraction. The investigated samples exhibit a ferromagnetic to paramagnetic transition with increasing temperature. The presence of manganese in the structure leads to an increase of the Curie temperature as well as to spontaneous magnetization. Electrical investigations showed that all our samples exhibit a semi-conducting behavior at high temperature and a metallic-like one at low temperature. A large magnetoresistance has been observed in the samples studied. The magnetization versus applied magnetic field shows a small coercive field and an unsaturated magnetization which indicates that the nanoparticles of all samples are superparamagnetic at around room temperature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
