Coexistence of Ferro- and Antiferromagnetism in the Itinerant Electron System Sc_1−xTi_xFe₂

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The magnetic structure and magnetic phase transitions of Sc_1−xTi_xFe₂ with x≥0.7 are studied from measurements of Mössbauer effect and magnetization. A coexistent state of ferro- and antiferromagnetism appears below ∼100 K for x=0.9 and below ∼200 K for x=0.75. The results suggest that this system is an itinerant electron system with weakly coupled ferromagnetic and antiferromagnetic components of spin fluctuation modes.