Physical properties of the layered f-electron van der Waals magnet Ce2Te5
Abstract
We report a detailed study of the magnetic, transport, and thermodynamic properties of Ce2Te5 single crystals, a layered f-electron van der Waals magnet. Four consecutive transitions at 5.2, 2.1, 0.9, and 0.4 K were observed in the ac-plane electrical resistivity (T), which were further confirmed in specific heat Cp(T) measurements. Analysis of the magnetic susceptibility (T), the magnetic-field variation of (T), and the increase of the first transition temperature (Tc 5.2 K) with applied magnetic field indicates ferromagnetic order, while the decrease of the other transitions with field suggests different states with dominant antiferromagnetic interactions below T2 2.1 K, T3 0.9 K, and T4 = 0.4 K. Critical behavior analysis around Tc that gives critical exponents β = 0.31(2), γ = 0.99(2), δ = 4.46(1), Tc = 5.32(1) K indicates that Ce2Te5 shows a three-dimensional magnetic critical behavior. Moreover, the Hall resistivity xy indicates that Ce2Te5 is a multi-band system with a relatively high electron mobility 2900 cm2 V-1 s-1 near Tc, providing further opportunities for future device applications.
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