Fig. 2. SQUID measurements of the CrTe₂ films.

a Temperature dependent magnetization curves of the films with various thicknesses under field-cooled mode. The magnetic field is applied along the out-of-plane direction with a magnitude of 1000 Oe. The high T_C is preserved with thickness decreasing to 3 ML. b, c Magnetic hysteresis loops of 7 ML CrTe₂ at different temperatures with external fields along the perpendicular (b) and parallel orientation (c) with respect to sample plane, indicating a strong out-of-plane magnetic anisotropy. d Enlarged hysteresis loops of 7 ML CrTe₂ at 300 K, where the intrinsic ferromagnetism and PMA still maintains. Top inset: temperature dependence of K_u for 7 ML CrTe₂, where the K_u is preserved at 300 K, despite the lower intensity with the increase of temperature.