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
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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