^{59}Co-Nuclear Quadrupole Resonance and Nuclear Magnetic Resonance studies on YCoGe --- Comparison between YCoGe and UCoGe ---

TL;DR

This study uses ^{59}Co-NQR and NMR techniques to compare the magnetic properties of YCoGe and UCoGe, revealing that ferromagnetism and superconductivity in UCoGe stem from U-5f electrons, unlike YCoGe.

Contribution

It provides a detailed comparison of magnetic behaviors in YCoGe and UCoGe, highlighting the role of U-5f electrons in UCoGe's properties.

Findings

No magnetic or superconducting transitions in YCoGe down to 0.3 K

YCoGe exhibits conventional metallic behavior

Ferromagnetism and superconductivity in UCoGe originate from U-5f electrons

Abstract

We have performed ^{59}Co-nuclear quadrupole resonance (NQR) and nuclear magnetic resonance (NMR) studies on YCoGe, which is a reference compound of ferromagnetic superconductor UCoGe, in order to investigate the magnetic properties at the Co site. Magnetic and superconducting transitions were not observed down to 0.3 K, but a conventional metallic behavior was found in YCoGe, although its crystal structure is similar to that of UCoGe. From the comparison between experimental results of two compounds, the ferromagnetism and superconductivity observed in UCoGe originate from the U-5f electrons.