Synthesis and magnetic properties of nano-dimensional Fe1-xCuxAl2O4

Maiti, S and Kundu, AK and Lebedev, OI and Bera, Parthasarathi and Anandan, C and Gayen, A and Seikh, MM (2015) Synthesis and magnetic properties of nano-dimensional Fe1-xCuxAl2O4. RSC Advances, 5 (102). pp. 83809-83817. ISSN 20462069

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Here we report, the sol-gel synthesized, microstructural analysis, surface and magnetic properties of solid solutions of Fe1-xCuxAl2O4. The singular phase of the samples for x values varied between 0.3 and 0.8 at 700 °C has been obtained. The powder X-ray diffraction, electron diffraction and HRTEM analysis reveal that the particle size systemically increases with the increase in x value. The XPS studies have confirmed the presence of Cu2+ species with a (Fe + Cu)/Al surface atomic ratio close to the bulk stoichiometric value. Unlike the common magnetic spinels with B-site magnetic cations, Fe1-xCuxAl2O4 shows only A-site magnetism in a diamond-type lattice. The samples with smaller particle size, namely the samples for x = 0.3 and 0.4 exhibit small magnetization. The origin of such magnetism is attributed to the inversion in the spinel structure and the defect induced magnetism. Except for the x = 0.7 sample, all other samples show spin glass behavior.

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Mr. BS Shivaram
Date Deposited: 02 May 2018 10:47
Last Modified: 02 May 2018 10:47

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