Development of high-pressure technique for single-crystal magnetic neutron diffraction under 10 GPa

Osakabe, Toyotaka  

A hybrid-anvil device was newly developed for high-pressure single-crystal magnetic neutron diffraction experiments up to 10 GPa. The device is composed of a large sapphire anvil and a tungsten carbide (WC) anvil that has a hollow in the center of the culet. In a feasibility test of the device, the maximum pressure of 7 GPa was generated with high stability. We also found that the glycerin has potential of the quasi-hydrostatic medium under 10 GPa. Using the hybrid-anvil device with the glycerin medium, single-crystal magnetic neutron diffraction experiments on valence transition material YbInCu were performed up to 6.2 GPa. In spite of the small magnetic moment of less than 1/ Yb, distinct magnetic signals were successfully observed.