K.A. Chao
Physical Review B
The magnetotransport and magnetic properties of epitaxial (Formula presented) 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 (Formula presented) 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. © 1997 The American Physical Society.
K.A. Chao
Physical Review B
J.V. Harzer, B. Hillebrands, et al.
Journal of Magnetism and Magnetic Materials
M.A. Lutz, R.M. Feenstra, et al.
Surface Science
I. Morgenstern, K.A. Müller, et al.
Physica B: Physics of Condensed Matter