Magnetism of UTGe compounds tuned by hydrogen absorption

Abstract

UTGe compounds absorb hydrogen up to 2 H atoms/f.u., which has a dramatic impact on the 5f magnetism. The TC value of UCoGe increases to 50 K.

Magnetic susceptibility of spin fluctuator UFeGe markedly increases. For ferromagnetic URhGe only α-hydride could be obtained, which moderate increase of TC and spontaneous moment.

The α-hydride of UCoGe is surprisingly paramagnetic despite of a small volume expansion (0.25 %).

Keywords

• Magnetism
• UTGe
• compounds
• hydrogen absorption