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- W1984062251 abstract "We report a systematic study of the temperature dependence of the anomalous Hall and longitudinal conductivities ${ensuremath{sigma}}_{mathit{xy}}$ and ${ensuremath{sigma}}_{mathit{xx}}$ and resistivities ${ensuremath{rho}}_{mathit{xy}}$ and ${ensuremath{rho}}_{mathit{xx}}$ in a series of metallic (Ga,Mn)As samples. Two universal scaling relations are obtained: ${ensuremath{sigma}}_{mathit{xy}}ensuremath{propto}{ensuremath{sigma}}_{mathit{xx}}^{1.5}$, obtained from measurements at a fixed low temperature (2.0 K) on a series of samples with different Mn concentrations; and ${ensuremath{rho}}_{mathit{xy}}/mensuremath{propto}{ensuremath{rho}}_{mathit{xx}}^{2}$, where $m$ is normalized magnetization, obtained from the temperature variation of ${ensuremath{rho}}_{mathit{xx}}$ and ${ensuremath{rho}}_{mathit{xy}}$ measured on each sample of the series. The former scaling relation is, however, found to break down for highly conducting (Ga,Mn)As samples (${ensuremath{sigma}}_{mathit{xx}}>100$ ${ensuremath{Omega}}^{ensuremath{-}1}$ cm${}^{ensuremath{-}1}$). The latter scaling relation leads to a magnetization-dependent anomalous Hall coefficient, which we attribute to the emergence of magnetization fluctuations at high temperatures." @default.
- W1984062251 created "2016-06-24" @default.
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- W1984062251 date "2011-04-25" @default.
- W1984062251 modified "2023-09-24" @default.
- W1984062251 title "Scaling relations between anomalous Hall and longitudinal transport coefficients in metallic (Ga,Mn)As films" @default.
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- W1984062251 doi "https://doi.org/10.1103/physrevb.83.144421" @default.
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