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Effective anomalous Hall coefficient in an ultrathin Co layer sandwiched by Pt layers
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/content/aip/journal/jap/115/6/10.1063/1.4865791
2014-02-13
2014-10-21

Abstract

Anomalous Hall effect in Co/Pt multilayer is important to study the effect of interface with strong spin-orbit coupling. However, the shunting effect of the layers in such system and the circuit in the plane perpendicular to the injected current were overlooked in most works and thus, anomalous Hall coefficient in Co/Pt multilayer has not been determined accurately. Considering the shunting effect and the equivalent circuit, we show that the effective anomalous Hall coefficient of a 0.5 nm thick Co layer sandwiched by Pt layers is 0.29 ± 0.01 Ω cm/T at the zero temperature limit and increases to about 0.73 Ω cm/T at the temperature of 300 K. is one order larger than that in bulk Co film, indicating the large contribution of the Co/Pt interface. increases with the resistivity of Co as well as a resistivity independent contribution of −0.23 ± 0.01 Ω cm/T. The equivalent anomalous Hall current in the Co layer has a maximum of 1.1% of the injected transverse current in the Co layer around the temperature of 80 K.

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Scitation: Effective anomalous Hall coefficient in an ultrathin Co layer sandwiched by Pt layers
http://aip.metastore.ingenta.com/content/aip/journal/jap/115/6/10.1063/1.4865791
10.1063/1.4865791
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