High-field moment polarization in the itinerant ferromagnet URhSi

TL;DR

This study investigates the magnetic and electronic behavior of URhSi under high magnetic fields, revealing pseudo-metamagnetism and comparing its properties with related ferromagnetic and superconducting materials.

Contribution

It provides the first high-field measurements of URhSi, highlighting its pseudo-metamagnetic transition and offering insights into its relation to similar ferromagnetic superconductors.

Findings

Pseudo-metamagnetism at 30-40 T for H//b

Broad magnetization step and resistivity maximum

Comparison with URhGe, UCoGe, and UTe2

Abstract

We report a high-magnetic-field study of the itinerant ferromagnet URhSi. Magnetization and electrical resistivity were measured under magnetic fields $\mu_0H$ up to 58~T applied along the directions $\mathbf{a}$, $\mathbf{b}$, and $\mathbf{c}$ of the orthorhombic structure and temperatures $T$ ranging from 1.5 to 50 K. For $\mathbf{H}\parallel\mathbf{b}$, pseudo-metamagnetism at $\mu_0H_m\simeq30-40$~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 UTe$_2$.