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Tailoring Magnetoresistance in Nanosized Sr2FeMoO6 by Varying the Content of the Parasitic SrMoO4 Phase

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Double-perovskite Sr2FeMoO6 samples with average crystallite sizes of 18–26 nm were prepared by using the sol–gel reaction followed by heat treatment at 900 °C, 1000 °C and 1100 °C, respectively, in a stream of a H2/Ar mixture. The crystal structure, microstructure and composition of the samples were investigated by synchrotron X-ray diffraction, field-emission scanning electron microscopy and atomic emission spectroscopy. Magnetization and magnetoresistance curves were measured, respectively, by means of a vibrating sample magnetometer and by using the four-probe method. Factors which have an impact on the magnetoresistance data including the magnetization process, antisite disorder and content of the impurity phase SrMoO4 at grain boundaries of nanosized particles were examined. The degree of spin polarization was assessed for the sample annealed at 900 °C, the microstructure of which appeared to be most favorable for intergrain tunneling process.
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Document Type: Research Article

Publication date: September 1, 2018

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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