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Andrei Kirilyuk, Alexey Kimel, Fredrik Hansteen, Roman V. Pisarev, and Theo Rasing, Ultrafast all-optical control of the magnetization in magnetic dielectrics, Low Temp. Phys. 32, (2006) [Fiz. Nizk. Temp. 32, 985-1009, (2006)] DOI: https://doi.org/10.1063/1.2219497.