Sivakumar, V. and Kumar, S. and Ross, C.A. and Horn, Y.S. (2007) Magnetic and Structural Investigation of Electrochemically Lithiated Magnetite Nanoparticles. IEEE Transactions on magnetics, 43 (6).
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Abstract
Magnetite Fe3O4, a spinel structure (Fd3m), has interesting properties such as room-temperature ferrimagnetism, high Curie temperature, and spin polarization. The reasonable electrical conductivity of magnetite opens the possibility of modifying the saturation magnetization by inserting Li+ ions into the structure, in a process similar to that used in conventional lithium batteries. In this study, we have measured the effects of electrochemical lithiation on the structure and magnetic properties of magnetite nanoparticles. A decrease in of up to 75% was observed upon addition of 2 moles of Li per formula unit, along with changes in remanence and coercivity. The insertion of Li+ changes the moment by altering both the valence states and the locations of the Fe ions within the structure, and a model is proposed to explain the observations.
Item Type: | Article |
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Uncontrolled Keywords: | Ferrimagnetic; magnetite; nanoparticles; spinel |
Subjects: | Electrochemical Materials Science |
Divisions: | UNSPECIFIED |
Depositing User: | ttbdar CECRI |
Date Deposited: | 27 Mar 2012 11:20 |
Last Modified: | 27 Mar 2012 11:20 |
URI: | http://cecri.csircentral.net/id/eprint/656 |
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