A NiCrAl pressure cell up to 4.6 GPa and its application to cuprate and pnictide superconductors

A pressurizingtrial was performed for a hybrid NiCrAl hybrid pressurecell and a pressureof 4.6 GPa was achieved under a steady load of 15.0 ton, which marks the highest pressureever known for a piston-cylinder-type pressurecell. The pressureefficiency at 15.0 tonwas 75% and the expansion of the inner diameter of the NiCrAl cylinder partially reached 5%. The pressurecell was applied to nuclear-magnetic-resonanceexperiments on cuprateand pnictide superconductors.