Fig. 1: Characterization of Fe₃GaTe₂ bulk crystals.

a Crystal structure of Fe₃GaTe₂ under different orientations: general view, bc-plane and ac-plane. b Powder x-ray diffraction (PXRD) pattern of the bulk crystal with indexed prominent Bragg peaks. c Scanning electron microscope image of an exfoliated flake on SiO₂/Si substrate (i) with corresponding elemental Fe (ii), Ga (iii) and Te (iv) maps and energy-dispersive spectra (v). The scale bar on the SEM image is 20 μm. d Spontaneous magnetization dependence with magnetic field applied out-of-plane at different temperatures. e Hall resistivity of a bulk sample measured at different temperatures with the magnetic field applied in the out-of-plane direction. Inset shows the measured anomalous Hall angle as a function of temperature. f Spontaneous magnetization under field-cooled (FC) and zero-field-cooled (ZFC) conditions with respect to temperature with the magnetic field (1000 Oe) applied out-of-plane. g Specific heat capacity measurement with zero and a 10 kOe magnetic field applied in the out-of-plane direction. Inset shows a fine scan at zero field near the magnetic transition showing a small upturn near the magnetic transition temperature. Error bars represent the standard deviation. h Temperature dependence of the bulk longitudinal resistivity. Inset shows the derivative of the longitudinal resistivity with respect to temperature. A broad peak indicates the presence of a magnetic transition.