Issue |
EPL
Volume 114, Number 5, June 2016
|
|
---|---|---|
Article Number | 57004 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/114/57004 | |
Published online | 07 July 2016 |
Scaling of the anomalous Hall effect in lower conductivity regimes
1 Department of Materials Science and Engineering, University of California - Berkeley, CA 94720, USA
2 Materials Science Division, Lawrence Berkeley National Lab - Berkeley, CA 94720, USA
3 Physics Department, University of California - Berkeley, CA 94720, USA
4 Groupe de Physique des Matériaux, UMR CNRS 6634, Université de Rouen - 76801 St. Etienne du Rouvray, France
Received: 28 January 2016
Accepted: 12 June 2016
The scaling of the anomalous Hall effect (AHE) was investigated using amorphous and epitaxial FexSi1−x (0.43 < x < 0.71) magnetic thin films by varying the longitudinal conductivity using two different approaches: modifying the carrier mean free path
with chemical or structural disorder while holding the carrier concentration
constant or varying nh and keeping l constant. The anomalous Hall conductivity
, when suitably normalized by magnetization and nh, is shown to be independent of
for all samples. This observation suggests a primary dependence on an intrinsic mechanism, unsurprising for the epitaxial high conductivity films where the Berry phase curvature mechanism is expected, but remarkable for the amorphous samples. That the amorphous samples show this scaling indicates a local atomic level description of a Berry phase, resulting in an intrinsic AHE in a system that lacks lattice periodicity.
PACS: 73.50.-h – Electronic transport phenomena in thin films / 73.61.Jc – Amorphous semiconductors; glasses / 73.50.Jt – Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects)
© EPLA, 2016
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.