Pressure induced magnetic ordering in YbInCu4

In order to investigate pressure-induced magnetically ordered phase in YbInCu4, the DC magnetization has been measured up to 7.57GPa by using the combined system of a diamond-anvil pressure cell and a superconducting quantum interference device (SQUID) with a vibrating coil magnetometer. In the pressure range above 3.05 GPa, a rapid increase in the magnetization below was observed, giving the first direct evidence of spontaneous magnetization in the high pressure phase of YbInCu4. TM shows weak pressure dependence up to the maximum pressure of 7.57GPa. A phase diagram for YbInCu4 over a wide range of pressure is presented.