Single crystals of PrAlGe were prepared by a self-flux technique using extra Al as a flux. The detailed growth process was described in a previous report. The crystal structure of PrAlGe was checked by the x-ray diffraction (XRD), performed on a Rigaku-TTR3 x-ray diffractometer, with high intensity graphite monochromatized Cu Kα radiation. The chemical compositions of the single crystal were checked by energy dispersive x-ray (EDX) spectrometry. The magnetization measurements, including the angle-, temperature-, and field-dependent magnetization, were carried out by a Quantum Design vibrating sample magnetometer (SQUID-VSM). In order to obtain the magnetic entropy change, the initial isothermal magnetization with field applied along the c axis (H//c) was measured. Before each measurement of initial isothermal magnetization, the sample was heated to room temperature and held for 2 min, then cooled to the target temperature under zero field. The magnetic field was relaxed before data collection, and a no-overshoot mode was applied to ensure a precise magnetic field. The magnetization under high magnetic field beyond 7 T was performed on the water-cooling resistive magnet.

Single crystals of PrAlGe were prepared by a self-flux technique using extra Al as a flux. The detailed growth process was described in a previous report. The crystal structure of PrAlGe was checked by the x-ray diffraction (XRD), performed on a Rigaku-TTR3 x-ray diffractometer, with high intensity graphite monochromatized Cu Kα radiation. The chemical compositions of the single crystal were checked by energy dispersive x-ray (EDX) spectrometry. The magnetization measurements, including the angle-, temperature-, and field-dependent magnetization, were carried out by a Quantum Design vibrating sample magnetometer (SQUID-VSM). In order to obtain the magnetic entropy change, the initial isothermal magnetization with field applied along the c axis (H//c) was measured. Before each measurement of initial isothermal magnetization, the sample was heated to room temperature and held for 2 min, then cooled to the target temperature under zero field. The magnetic field was relaxed before data collection, and a no-overshoot mode was applied to ensure a precise magnetic field. The magnetization under high magnetic field beyond 7 T was performed on the water-cooling resistive magnet.