Publikation: All-optical switching in Cr- and Mn-doped L10 FePt thin films
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Optical manipulation of the magnetization of thin films opens up exciting possibilities for ever-faster magnetic storage applications. In this context, L10 chemically ordered FePt thin films are of particular interest due to their high perpendicular magnetic anisotropy and their use as a storage material for heat-assisted magnetic recording devices. However, these materials are difficult to manipulate with external fields due to their high coercivity field. Thus, we want to explore the possibility of tailoring the properties of these materials to enable switching using all-optical techniques. While stochastic all-optical switching between partially magnetized states has been reported for undoped FePt thin films, we have investigated to what extent doping with third elements can influence the switching behavior. Reducing the saturation magnetization may be one way to facilitate all-optical switching. While this is expected with the introduction of additional elements, we also want to highlight the role of the inverse Faraday effect and the magnetic circular dichroism in stochastic all-optical switching. In this study, Cr was found to be a promising dopant, which can almost double the relative magnetization change of the partially magnetized states compared to pure FePt.
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STIEHL, Martin, Stephan WUST, Nataliia SCHMIDT, Tobias DANNEGGER, Johannes SEYD, Marco BERRITTA, Peter M. OPPENEER, Manfred ALBRECHT, Ulrich NOWAK, Martin AESCHLIMANN, 2024. All-optical switching in Cr- and Mn-doped L10 FePt thin films. In: Physical Review Applied. American Physical Society (APS). 2024, 21(5), 054064. eISSN 2331-7019. Verfügbar unter: doi: 10.1103/physrevapplied.21.054064BibTex
@article{Stiehl2024-05-30Allop-70122, year={2024}, doi={10.1103/physrevapplied.21.054064}, title={All-optical switching in Cr- and Mn-doped L1<sub>0</sub> FePt thin films}, number={5}, volume={21}, journal={Physical Review Applied}, author={Stiehl, Martin and Wust, Stephan and Schmidt, Nataliia and Dannegger, Tobias and Seyd, Johannes and Berritta, Marco and Oppeneer, Peter M. and Albrecht, Manfred and Nowak, Ulrich and Aeschlimann, Martin}, note={Article Number: 054064} }
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