Magnetic properties of EuCuAs single crystal

•The single crystal of EuCuAs has been grown.•An antiferromagnetic transition is observed at the temperature of 14 K.•A metamagnetic transition is observed when H//ab.•The magnetic phase diagrams are established.

Single crystalline EuCuAs with a hexagonal structure was grown and the magnetic properties were studied by measuring the magnetization and magnetoresistance (MR), for both field parallel the ab-plane (H//ab)(H//ab) and the c  -axis (H//c)(H//c). An antiferromagnetic (AFM) transition is observed at the transition temperature (TN)(TN) of 14 K. For both H//abH//ab and H//cH//c, the magnetization increases quickly with increasing magnetic field and saturated at high field for temperatures below TNTN. For H//abH//ab, even a metamagnetic transition can be observed at low magnetic fields. The saturated values of magnetization are 6.8 and 7.0 μBμB f.u.−1 for H//abH//ab and H//cH//c, respectively, implying that the moments come from Eu2+ ions. According to the data of magnetization and MR measurements, magnetic phase diagrams are established for both H//abH//ab and H//cH//c.