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Element-specific magnetic hysteresis loops of 5.8 nm Co56Pt44 NPs taken at the Co-L3 edge maximum dichroic signal at T = 11 K, 100 K and 300 K after annealing at T = 700 °C for 90 min in out-of-plane geometry. Note that hysteresis loops are normalized to the magnetization at B = 2.9 T (maximum field).
