Critical behavior from the anomalous Hall effect in (GaMn)As
Abstract
An unconventional approach to scaling based on the anomalous Hall effect is presented and utilized to demonstrate conclusively that epitaxial (metallic) Ga0.98Mn0.02As is a mean-field ferromagnet. Such a result provides strong support for the assertion that the underlying interactions can be treated within the framework of Landau mean-field theory, direct support for which had previously been lacking. This scaling approach also provides confirmation—albeit indirect—that the origin of the anomalous Hall effect in this system is intrinsic at the composition studied.
- Publication:
-
Physical Review B
- Pub Date:
- December 2009
- DOI:
- 10.1103/PhysRevB.80.214409
- Bibcode:
- 2009PhRvB..80u4409J
- Keywords:
-
- 75.50.Pp;
- 73.43.Fj;
- 75.40.-s;
- 75.47.-m;
- Magnetic semiconductors;
- Novel experimental methods;
- measurements;
- Critical-point effects specific heats short-range order;
- Magnetotransport phenomena;
- materials for magnetotransport