Magnetoresistance and magnetic properties of epitaxial magnetite thin films
- 1 September 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 56 (9), 5096-5099
- https://doi.org/10.1103/physrevb.56.5096
Abstract
The magnetotransport and magnetic properties of epitaxial thin films grown on (001)-oriented MgO substrates by pulsed-laser deposition have been investigated. The magnetoresistance (MR) exhibits a peak around the Verwey transition as has also been reported previously for single crystals. Additionally, we have observed that the MR increases monotonically below 100 K with decreasing temperature. MR values as high as 32% have been observed for a 6600-Å-thick film at 60 K under a 4-T field. The enhanced low-temperature MR is attributed to a magnetic-field-dependent activation energy for electron hopping transport.
Keywords
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