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arXiv · 1908.05974

Scaling Analysis of Anomalous Hall Resistivity in the Co$_{2}$TiAl Heusler Alloy

Rudra Prasad Jena·Devendra Kumar·Archana Lakhani
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Abstract

A comprehensive magnetotransport study including resistivity ($\rho_{xx}$) at various fields, isothermal magnetoresistance and Hall resistivity ($\rho_{xy}$) has been carried out at different temperatures on the Co$_{2}$TiAl Heusler alloy. Co$_{2}$TiAl alloy shows a paramagnetic (PM) to ferromagnetic (FM) transition below the curie temperature (T$_{C}$) $\sim$ 125 K. In the FM region, resistivity and magnetoresistance reveals a spin flip electron-magnon scattering and the Hall resistivity unveils the anomalous Hall resistivity ($\rho_{xy}^{AH}$). Scaling of anomalous Hall resistivity with resistivity establishes the extrinsic scattering process responsible for the anomalous hall resistivity; however Skew scattering is the dominant mechanism compared to the side-jump contribution. A one to one correspondence between magnetoresistance and side-jump contribution to anomalous Hall resistivity verifies the electron-magnon scattering being the source of side-jump contribution to the anomalous hall resistivity.

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Rudra Prasad Jena, Devendra Kumar, Archana Lakhani. 2019-08-16. Scaling Analysis of Anomalous Hall Resistivity in the Co$_{2}$TiAl Heusler Alloy. https://arxiv.org/abs/1908.05974

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