Universal scaling of the anomalous Hall effect in Fe3 O4 epitaxial thin films

Fernandez-Pacheco, A. , De Teresa, J.M., Orna, J., Morellon, L., Algarabel, P.A., Pardo, J.A. and Ibarra, M.R. (2008) Universal scaling of the anomalous Hall effect in Fe3 O4 epitaxial thin films. Physical Review B, 77, 100403(R). (doi: 10.1103/PhysRevB.77.100403)

Abstract

We report a systematic study of the anomalous Hall effect in epitaxial thin films of magnetite grown on MgO (001) substrates as a function of film thickness (from 5 to 150 nm) and temperature (60K < T < 300K). The Hall resistivity was found to be negative for all the measured temperature range, presenting a huge enhancement at temperatures below the Verwey transition, reaching values above 1mΩ cm. The anomalous Hall conductivity scales as σH ∝ σ 1.6/xx over four decades of the longitudinal conductivity σxx in all the samples, in agreement with a recent unified theory for the anomalous Hall effect.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Fernandez-Pacheco, Dr Amalio
• Authors: Fernandez-Pacheco, A., De Teresa, J.M., Orna, J., Morellon, L., Algarabel, P.A., Pardo, J.A., and Ibarra, M.R.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: Physical Review B
• Publisher: American Physical Society
• ISSN: 1098-0121