Critical behavior of quasi-two-dimensional weak itinerant ferromagnet trigonal chromium telluride Cr${}_{0.62}$Te

Abstract

The critical properties of flux-grown single-crystalline quasi-two-dimensional weak itinerant ferromagnet Cr${}_{0.62}$Te were investigated by bulk dc magnetization around the paramagnetic (PM) to ferromagnetic (FM) 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 $T_c=230$ K. With these obtained exponents, the magnetization-field-temperature curves collapse into two independent curves following a single scaling equation $M|\frac{T-T_c}{T_c}{|}^{-\beta }=f_{\pm }(H|\frac{T-T_c}{T_c}{|}^{-\beta \delta })$ around $T_c$, suggesting the reliability of the obtained exponents. Additionally, the determined exponents of Cr${}_{0.62}$Te 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 2D to 3D on cooling through $T_c$.

References in corpus (2)

• Tricritical behavior of two-dimensional intrinsic ferromagnetic semiconducting CrGeTe3
• Magnetic anisotropy of the single-crystalline ferromagnetic insulator Cr2Ge2Te6

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