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Recently, FeRh thin films have attracted extensive attention, due to the diversity of their possible applications [[i]]. Their near room temperature metamagnetic transition from antiferromagnetic (AF) to ferromagnetic (FM) order [[ii],] and the interoperability between FM and paramagnetic (PM) states provide an excellent base for energy-saving spintronic devices [[iii]]. Moreover, the outstanding caloric parameters and non-toxic biocompatibility of FeRh give novel alternatives for developing gas-free domestic magnetic refrigerators, or new medical applications [[iv]]
In our work, we achieved reversible alteration of the FeRh structural phase between FM B2 and PM A2 phases through the application of Ne+ irradiation and heat treatment. By inducing the FM à PM transition, FM nanopatterns were created within the PM matrix using nanosphere ion-beam lithography. Conversely, the PM à FM transition was utilized to generate magnetic domains through laser irradiation.
Based on these results, a tailored magnetic pattern can be implemented in FeRh film, which can be a great step to design modern nano-devices.
[[i]] Merkel D G, Lengyel A, Nagy D L, Németh A, Horváth Z E, Bogdán Cs, Gracheva M A, Hegedűs G, Sajti Sz, Radnóczi Gy Z and Szilágyi E 2020 Sci. Rep. 10(1), 13923.
[[ii]] Cherifi RO, Ivanovskaya V, Phillips LC, Zobelli A, Infante IC, Jacquet E, Garcia V, Fusil S, Briddon PR, Guiblin N, Mougin A, Ünal AA, Kronast F, Valencia S, Dkhil B, Barthélémy A and Bibes M 2014 Nat. Mater. 13(4), 345
[[iii]] Merkel D G, Hegedűs G, Gracheva M A, Deák A, Illés L, Németh A, Maccari F, Radulov I, Major M, Chumakov A I, Bessas D, Nagy D L, Zolnai Zs, Graning S, Sájerman K, Szilágyi E and Lengyel A 2022 ACS Appl. Nano Mater. 5(4), 5516
[[iv]] Qiao K, Liang Y, Zhang H, Hu F, Yu Z, Long Y, Wang J, Sun J, Zhao T and Shen B 2022 J. Alloys Compd. 907, 164574
