Magnetic Field Effect On Magnetic And Electrical Properties Of Mn2-Xcuxsb

In order to investigate the magnetic and the electrical properties of Mn2-xCuxSb (x=0.06, 0.10, and 0.15), the magnetization and the electrical resistivity measurements were carried out in the temperature range from 10 K to 300 K under magnetic fields up to mu(0) H = 5 T. The Curie temperature T-C of Mn1.94Cu0.06Sb was determined to be 517 K. Mn1.94Cu0.06Sb showed a first-order magnetic transition from a ferrimagnetic (FRI) to an antiferromagnetic (AFM) phase at T-t = 117 K with a thermal hysteresis of approximately 20 K. The low-field magnetic data of Mn1.94Cu0.06Sb also showed an anomaly at 207 K, indicating a spin reorientation. With increasing x, T-t increases to 154 K (x = 0.15), whereas T-C is almost constant for 0.06 <= x <= 0.15. The electrical resistivity changes abruptly by 25%-36% at T-t. By applying a magnetic field of mu(0) H = 5 T, T-t decreases and the width of the hysteresis increases. In addition, we confirmed that the value of the magnetization at low temperatures below T-t depends on the cooling process for a magnetic field.