Critical behavior of the quasi-two-dimensional weak itinerant ferromagnet trigonal chromium telluride Cr0.62Te

The critical properties of flux-grown single-crystalline quasi-two-dimensional weak itinerant ferromagnet Cr0.62Te were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic phase transition. Critical exponents beta = 0.315(7) with a critical temperature T-c = 230.6(3) K and gamma = 1.81(2) with T-c = 229.1(1) K are obtained by the Kouvel-Fisher method whereas delta = 6.35(4) is obtained by a critical isotherm analysis at Tc = 230 K. With these obtained exponents, the magnetization-field-temperature curves collapse into two independent curves following a single scaling equation M vertical bar T-T-c/T-c vertical bar(-beta) = f +/-(H vertical bar T-T-c/T-c vertical bar(-beta delta)) around T-c, suggesting the reliability of the obtained exponents. Additionally, the determined exponents of Cr0.62Te exhibit an Ising-like behavior with a change from short-range order to long-range order in the nature of magnetic interaction and with an extension from two to three dimensions on cooling through T-c.