# Spin–Flop and Metamagnetic Transition in Monoclinic Eu4Bi6Se13

## TL;DR

This paper studies the magnetic and structural properties of a europium-based compound, revealing unique magnetic transitions and anisotropy.

## Contribution

The study identifies spin-flop and metamagnetic transitions in monoclinic Eu4Bi6Se13 due to its unique crystal structure.

## Key findings

- Eu4Bi6Se13 exhibits uniaxial magnetic anisotropy along the b-axis.
- Metamagnetic transitions occur at approximately 12 kOe and a lower field.
- Spin-flop transitions are observed below 10 kOe with possible domain-induced hysteresis.

## Abstract

This study explores
an investigation of the crystallographic,
electronic,
and magnetic properties of the europium-based bismuth selenide compound
Eu4Bi6Se13, with particular focus
on its magnetic anisotropy. This compound adopts a monoclinic crystal
structure classified under the P21/m space group (#11). It exhibits distinctive structural
features, including substantial Eu–Se coordination numbers
(6 and 8), Bi–Se ladders, and linear chains of Eu atoms that
propagate along the b-axis. Electronic resistivity
assessments indicate that Eu4Bi6Se13 exhibits metallic behavior. As the magnetic field is oriented along
the b-axis, magnetic characterization reveals uniaxial
magnetic anisotropy, with metamagnetic transitions appearing at approximately
12 kOe and a lower field. In the field below 10 kOe, the spin-flop
transition is observed with possible domain-induced hysteresis. This
behavior supports the identification of metamagnetic features in field-dependent
measurements attributable to the europium spins.