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arXiv · 2104.14792

Spin polarization and magnetotransport properties of systematically disordered $\mathrm{Fe}_{60}\mathrm{Al}_{40}$ thin films

Kiril Borisov·Jonathan Ehrler·Ciaran Fowley·Benedikt Eggert·Heiko Wende·Steffen Cornelius·Kay Potzger·Juergen Lindner·Juergen Fassbender·Rantej Bali·Plamen Stamenov
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Abstract

We investigate the evolution of spin polarization, spontaneous Hall angle (SHA), saturation magnetization and Curie temperature of $B2$-ordered Fe$_{60}$Al$_{40}$ thin films under varying antisite disorder, induced by Ne$^{+}$-ion irradiation. The spin polarization increases monotonically as a function of ion fluence. A relatively high polarization of 46 % and the SHA of 3.1 % are achieved on 40 nm thick films irradiated with 2 $\cdot$ 10$^{16}$ ions/cm$^2$ at 30 keV. An interesting divergence in the trends of the magnetization and SHA is observed for low disorder concentrations. The high spin polarization and its broad tunability range make ion-irradiated Fe$_{60}$Al$_{40}$ a promising material for application in spin electronic devices.

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Kiril Borisov, Jonathan Ehrler, Ciaran Fowley, Benedikt Eggert, Heiko Wende, Steffen Cornelius, Kay Potzger, Juergen Lindner, Juergen Fassbender, Rantej Bali, Plamen Stamenov. 2021-04-30. Spin polarization and magnetotransport properties of systematically disordered $\mathrm{Fe}_{60}\mathrm{Al}_{40}$ thin films. https://doi.org/10.1103/physrevb.104.134417

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