Coexistence of universal and topological anomalous hall effects in metal CrO2 thin films in the dirty limit.
Phys Rev Lett
; 102(22): 227201, 2009 Jun 05.
Article
em En
| MEDLINE
| ID: mdl-19658897
ABSTRACT
The scaling exponent of 1.6 between anomalous Hall and longitudinal conductivity, characteristic of the universal Hall mechanism in dirty-metal ferromagnets, emerges from a series of CrO2 films as we systematically increase structural disorder. Magnetic disorder in CrO2 increases with temperature and this drives a separate topological Hall mechanism. We find that these terms are controlled discretely by structural and magnetic defect populations, and their coexistence leads to apparent divergence from exponent 1.6, suggesting that the universal term is more prevalent than previously realized.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2009
Tipo de documento:
Article