Low Temperature Properties of Uranium Compounds Using Uniaxial Cell Driven by He Gas

Abstract

青木 大 Dai AOKI A He-activated loading-cell for uniaxial pressure experiments is presented. The cell is based on a He bellow with a piezo force sensor and anvils. The uniaxial pressure is varied at low temperature by tuning the He gas pressure outside of the cryostat. Three experimental results under uniaxial pressure are demonstrated, that is, reentant superconductivity in ferromagnetic superconductor URhGe, uniaxial pressure tuned ``hidden order'' and antiferromagnetism in URu 2 Si 2 , and uniaxial pressure expansion,