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Magnetoresistivity in CoFe(2)O(4)-BaTiO(3) composites produced by spark plasma sintering
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
2011 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 110, no 4, 044903- p.Article in journal (Refereed) Published
Abstract [en]

Ceramic composites of (CoFe(2)O(4))(x)-(BaTiO(3))((1-x)) with x = 0.20, 0.25, and 0.30 have been synthesized by spark plasma sintering at 1000 degrees C under a uniaxial pressure of 75 MPa using commercially available nanopowders as starting materials. The composites reveal a negative magnetoresistivity effect of about -1% at room temperature. An enhancement was observed at lower temperatures, and an effect of -4.1% was found in the composite with x 0.30 at 150 K by applying an external magnetic field of 25 kOe. The temperature dependence of the resistivity indicates variable range hopping involved in charge transport.

Place, publisher, year, edition, pages
2011. Vol. 110, no 4, 044903- p.
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Natural Sciences
Identifiers
URN: urn:nbn:se:su:diva-68297DOI: 10.1063/1.3622584ISI: 000294484300171OAI: oai:DiVA.org:su-68297DiVA: diva2:477965
Note
authorCount :4Available from: 2012-01-15 Created: 2012-01-03 Last updated: 2017-12-08Bibliographically approved

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