Volume 105, Number 4, February 2014
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||04 March 2014|
Enhancement in anomalous Hall resistivity of Co/Pd multilayer and CoPd alloy by Ga+ ion irradiation
1 Core Labs, King Abdullah University of Science and Technology (KAUST) - Thuwal 23955-6900, Saudi Arabia
2 Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Institute of Advanced Materials Physics, Faculty of Science, Tianjin University - Tianjin 300072, China
3 Materials Science and Engineering, King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900, Saudi Arabia
Received: 20 October 2013
Accepted: 12 February 2014
In this paper, we report the effect of Ga+ ion irradiation on anomalous Hall effect (AHE) and longitudinal resistivity in [Co(3 Å)/Pd(5 Å)]80 multilayer and Co42Pd58 alloy. 4- and 2-fold increases in anomalous Hall resistivity in the Co/Pd multilayer and CoPd alloy have been observed after irradiations at doses of and , respectively. Skew scattering and side jump contributions to AHE have been analyzed based on the scaling relationship . For the Co/Pd multilayer, AHE is mainly affected by ion irradiation-induced interface diffusion and defects. For the CoPd alloy, the increase in doses above induces a sign change in skew scattering, followed by the skew scattering contribution to AHE overwhelming the side jump contribution, this phenomenon should be attributed to irradiation-induced defects and modifications in chemical ordering.
PACS: 61.80.Lj – Atom and molecule irradiation effects / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces
© EPLA, 2014
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