The structural, magnetic, and transport properties of the pulsed laser-deposited Co${}_2$ FeAl thin films

Pulsed laser deposition (PLD)-grown Co${}_2$ FeAl (CFA) thin films on MgO(001) substrates are investigated in terms of structural, magnetic, and transport properties. The crystal structure of CFA thin films is changed from disordered A2 to partly ordered B2 structure, as the substrate temperature (T${}_s$) increases from 600 to 700 °C, and both the saturation magnetization M${}_s$ and the coercive field H${}_c$ are enhanced with increasing T${}_s$. Different from the CFA thin films prepared by magnetron sputtering, longitudinal resistivity shows a local minimum near 20 K for all the films due to a weak localization effect, and this type of low-temperature anomaly is weakened with the improvement of structure ordering. Moreover, the origin of anomalous Hall effect (AHE) in CFA thin films is dominated by intrinsic mechanism, and the scattering-independent intrinsic parameter is enhanced with the increase of T${}_s$ due to the improvement of crystal structure. (© 2022 Wiley‐VCH GmbH)