Electronic properties of field aligned CrO2 powders

Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.physb.2005.07.007

Title:	Electronic properties of field aligned CrO2 powders
Authors:	Tripathy, D. Adeyeye, A.O.
Keywords:	CrO2 Half metals Inelastic hopping Intergranular tunneling
Issue Date:	1-Nov-2005
Citation:	Tripathy, D., Adeyeye, A.O. (2005-11-01). Electronic properties of field aligned CrO2 powders. Physica B: Condensed Matter 368 (1-4) : 131-138. ScholarBank@NUS Repository. https://doi.org/10.1016/j.physb.2005.07.007
Abstract:	We have investigated in detail the electronic transport properties of half metallic CrO2 powder-based devices, fabricated using optical lithography and field alignment technique. A transition in the conduction mechanism from spin-dependent intergranular tunneling to inelastic hopping was observed at 215 K. This transition temperature shifts to 230 K in the presence of 10 kOe field cooling due to reduction of the spin-independent hopping conductance channel. I-V characteristics exhibit strong temperature dependence and are non-linear even at room temperature. Our experimental results are in good agreement with a simple theoretical model. A novel 'double switching' phenomenon was observed in the I-V curves below the transition temperature. © 2005 Elsevier B.V. All rights reserved.
Source Title:	Physica B: Condensed Matter
URI:	http://scholarbank.nus.edu.sg/handle/10635/82269
ISSN:	09214526
DOI:	10.1016/j.physb.2005.07.007
Appears in Collections:	Staff Publications

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