Kinetic arrest of the first order ferromagnetic to antiferromagnetic transition in Ce(Fe$_{0.96}$Ru$_{0.04}$)$_2$ : formation of a magnetic-glass

TL;DR

This study demonstrates the kinetic arrest of a first-order magnetic transition in Ce(Fe$_{0.96}$Ru$_{0.04}$)$_2$, leading to a non-ergodic magnetic-glass state distinct from spin-glasses, tracked via magnetization dynamics.

Contribution

It provides experimental evidence of magnetic-glass formation due to kinetic arrest in a specific alloy, highlighting a new type of non-ergodic magnetic state.

Findings

Kinetic arrest causes a magnetic-glass state in Ce(Fe$_{0.96}$Ru$_{0.04}$)$_2$.

Magnetic field assists in forming the glassy state.

Magnetization dynamics show slowing down indicating transition to a non-ergodic state.

Abstract

We present results of dc magnetization and magnetic relaxation study showing the kinetic arrest of a first order ferromagnetic to antiferromagnetic transition in Ce(Fe$_{0.96}$Ru$_{0.04}$)$_2$. This leads to the formation of a non-ergodic glass-like magnetic state. The onset of the magnetic-glass transformation is tracked through the slowing down of the magnetization dynamics. This glassy state is formed with the assistance of an external magnetic field and this is distinctly different from the well known 'spin-glass' state.