Abstract
In this paper, we demonstrate that films of magnetite, Fe3O4, can be deposited by the electrochemical reduction of a Fe(III)-triethanolamine complex in aqueous alkaline solution. the films were deposited with a columnar microstructure and a [100] preferred orientation on stainless steel substrates. In-plane electrical transport and magnetoresistance measurements were performed on the films after they were stripped off onto glass substrates. the resistance of the films was dependent on the oxygen partial pressure. We attribute the increase in resistance in O2 and the decrease in resistance in Ar to the oxidation and reduction of grain boundaries. the decrease in resistance in an Ar atmosphere exhibited first-order kinetics, with an activation energy of 0.2 eV. the temperature dependence of the resistance showed a linear dependence of log(R) versus T-1/2, consistent with tunneling across resistive grain boundaries. a room-temperature magnetoresistance of -6.5% was observed at a magnetic field of 9 T.
Recommended Citation
H. M. Kothari et al., "Electrochemical Deposition and Characterization of Fe₃O₄ Films Produced by the Reduction of Fe(III)-triethanolamine," Journal of Materials Research, vol. 21, no. 1, pp. 293 - 301, Materials Research Society (MRS), Jan 2006.
The definitive version is available at https://doi.org/10.1557/jmr.2006.0030
Department(s)
Chemistry
Sponsor(s)
National Science Foundation (U.S.)
United States. Department of Energy
Keywords and Phrases
Electrochemical deposition; Magnetite
International Standard Serial Number (ISSN)
0884-2914
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2006 Materials Research Society (MRS), All rights reserved.
Publication Date
01 Jan 2006
Comments
This work was supported by National Science Foundation Grant Nos. CHE-0243424, CHE-0437346, and DMR-0504715, and Department of Energy Grant No. DE-FC07-03ID14509.