# Domain engineering of the metastable domains in the 4f-uniaxial-ferromagnet CeRu$_2$Ga$_2$B

## TL;DR

This paper demonstrates how vector magnetic fields can be used to control and visualize magnetic domain shapes and sizes in the uniaxial ferromagnet CeRu$_2$Ga$_2$B, enabling potential applications in magnetic data storage.

## Contribution

It introduces a method to manipulate magnetic domain configurations in CeRu$_2$Ga$_2$B using external magnetic fields, revealing smooth transitions between domain types.

## Key findings

- Controlled domain shape and size via external magnetic fields
- Visualization of magnetic anisotropy in CeRu$_2$Ga$_2$B
- Transition from stripe to bubble domains

## Abstract

In search of novel, improved materials for magnetic data storage and spintronic devices, compounds that allow a tailoring of magnetic domain shapes and sizes are essential. Good candidates are materials with intrinsic anisotropies or competing interactions, as they are prone to host various domain phases that can be easily and precisely selected by external tuning parameters such as temperature and magnetic field. Here, we utilize vector magnetic fields to visualize directly the magnetic anisotropy in the uniaxial ferromagnet CeRu$_2$Ga$_2$B. We demonstrate a feasible control both globally and locally of domain shapes and sizes by the external field as well as a smooth transition from single stripe to bubble domains, which opens the door to future applications based on magnetic domain tailoring.