High-field moment polarization in the itinerant ferromagnet URhSi

Abstract

We report a high-magnetic-field study of the itinerant ferromagnet URhSi. Magnetization and electrical resistivity were measured under magnetic fields µ0H up to 58 T applied along the directions a, b, and c of the orthorhombic structure and temperatures T ranging from 1.5 to 50 K. For H b, pseudo-metamagnetism at µ0Hm 30 − 40 T is associated with a broad step in the magnetization and a maximum in the resistivity. The properties of URhSi are discussed and compared with those of the isostructural superconducting ferromagnets URhGe and UCoGe and of the superconducting paramagnet UTe2.

Alloying-driven transition between ferromagnetism and antiferromagnetism in UTGe compounds: UCo1−xIrxGe

“…This confirms the fact that the microscopic origin of the magnetism in these compounds is more complex than determined only by the overlaps of the 5f-orbitals of the nearest-neighbor U ions. The strong role of competing FM and AFM interactions mediated by the 5fligand hybridization determining the magnetic ground state was predicted for these compounds ADDIN EN.CITE [13,14] as well as for the recently discovered nonmagnetic heavy-fermion superconductor UTe 2 ADDIN EN.CITE [15,16].…”