Kumar, Nitu and Aloysius, R. P. and Gaur, Anurag and Kotnala, R. K. (2013) Study of ferromagnetic-metal type Sr2FeMoO6 + xAg (x=0-10 wt%) composites. Journal of Alloys and Compounds, 559. pp. 64-68. ISSN 0925-8388

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Abstract

Ferromagnetic-metal type Sr2FeMoO6 + xAg (x = 0, 1, 2, 3, 5 and 10 wt%) composites were synthesized by standard solid-state reaction method and studied their structural, magnetic and magneto-transport properties. The X-ray diffraction (XRD) pattern shows the XRD peaks corresponding to both Sr2FeMoO6 (SFMO) and metallic Ag phases, which indicates the successful formation of composites. High resolution field emission scanning electron microscope (FESEM) with energy dispersive X-ray spectroscopy (EDS) analysis also reveals the coexistence of both the phases in composite. It is also clear from FESEM images that the smaller size Ag particles reside over the grain surface/boundaries of SFMO grains. Dramatic decrease in electrical resistivity with the addition of Ag in the composites has been observed in the entire measured temperature range from 300-20 K. Moreover, a systematic decrease in low field magnetoresistance (LFMR) is also observed as we increased the Ag content. This decrement in LFMR values of these composites is mainly due to the presence of metallic Ag at the grain surface/boundaries of SFMO, which suppresses the spin polarized tunneling and finally reduces the magnetoresistance.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Chemistry > Physical Chemistry Materials Science Metallurgy & Metallurgical Engineering
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	03 Jun 2020 11:17
Last Modified:	03 Jun 2020 11:17
URI:	http://npl.csircentral.net/id/eprint/3027

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