# Missing magnetism in Sr$_{4}$Ru$_{3}$O$_{10}$: Indication for Antisymmetric Exchange Interaction

## TL;DR

This study investigates the magnetic behavior of Sr$_{4}$Ru$_{3}$O$_{10}$ near its metamagnetic transition, revealing the importance of antisymmetric exchange interactions like Dzyaloshinskii-Moriya in explaining observed phenomena.

## Contribution

The paper demonstrates that Dzyaloshinskii-Moriya interactions are essential to account for the reduced magnetic moment and complex metamagnetic features in Sr$_{4}$Ru$_{3}$O$_{10}$, supported by experimental and numerical analysis.

## Key findings

- Double-feature at $H_c$ is robust below 1.8 K.
- Field rotation shifts the double anomaly to higher fields.
- Dzyaloshinskii-Moriya interaction is crucial for explaining moment reduction.

## Abstract

We report a detailed study of the magnetization modulus as a function of temperature and applied magnetic field under varying angle in Sr$_{4}$Ru$_{3}$O$_{10}$ close to the metamagnetic transition at $H_{c}\backsimeq 2.5\,$T for $H \perp c$. We confirm that the double-feature at $H_{c}$ is robust without further splitting for temperatures below 1.8 K down to 0.48 K. The metamagnetism in Sr$_{4}$Ru$_{3}$O$_{10}$ is accompanied by a reduction of the magnetic moment in the plane of rotation and large field-hysteretic behavior. The double anomaly shifts to higher fields by rotating the field from $H\,\perp \,c$ to $H\,\parallel\,c$. We compare our experimental findings with numerical simulations based on spin reorientation models caused by intrinsic magnetocrystalline anisotropy and Zeeman effect. Crystal anisotropy is able to explain a metamagnetic transition in the ferromagnetic ordered system Sr$_{4}$Ru$_{3}$O$_{10}$, but a Dzyaloshinskii-Moriya term is crucial to account for a reduction of the magnetic moment as discovered in the experiments.