Abstract
In order to investigate pressure-induced magnetically ordered phase in YbInCu 4 , the DC magnetization has been measured up to 7.57 GPa 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 T M = 2.5 K was observed, giving the first direct evidence of spontaneous magnetization in the high pressure phase of YbInCu 4 . T M shows weak pressure dependence up to the maximum pressure of 7.57 GPa. A phase diagram for YbInCu 4 over a wide range of pressure is presented.
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