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Missing magnetism in Sr4Ru3O10: Indication for Antisymmetric Exchange Interaction
Franziska Weickert1,2, Leonardo Civale3, Boris Maiorov3
1Los Alamos National Laboratory, MPA-CMMS, Los Alamos, NM, 87545, USA. weickert@lanl.gov.
Scientific Reports
|June 22, 2017
Summary
Metamagnetism in the ferromagnetic Sr4Ru3O10 shows a unique reduction in magnetic moment at a specific transition. This phenomenon is explained by magnetocrystalline anisotropy and antisymmetric exchange interactions.
Area of Science:
- Condensed Matter Physics
- Materials Science
- Magnetism
Background:
- Sr4Ru3O10 is a ferromagnet with a Curie temperature (TC) of 105 K.
- It exhibits a notable metamagnetic anomaly below TC when magnetic fields are applied in the crystallographic ab-plane.
- This transition shifts to higher fields at lower temperatures and splits into a double anomaly.
Purpose of the Study:
- To investigate the magnetization vector components in Sr4Ru3O10.
- To understand the behavior of metamagnetism under varying temperature, magnetic field, and angle.
- To elucidate the underlying physical mechanisms driving the observed magnetic phenomena.
Main Methods:
- Detailed experimental study of magnetization vector components.
- Variable temperature, magnetic field, and angle-dependent measurements.
- Numerical simulations using spin reorientation models.
Main Results:
- A novel reduction of the magnetic moment in the plane of rotation at the metamagnetic transition was observed.
- The metamagnetic anomaly shifts to higher fields as the magnetic field rotates from in-plane (H⊥c) to out-of-plane (H∥c).
- Magnetocrystalline anisotropy and Zeeman effect explain the transition, while the Dzyaloshinskii-Moriya term is essential for the observed magnetic moment reduction.
Conclusions:
- Magnetocrystalline anisotropy and Zeeman effect are sufficient to describe the metamagnetic transition in Sr4Ru3O10.
- The Dzyaloshinskii-Moriya interaction is critical for accurately modeling the reduction in magnetic moment observed experimentally.
- This study provides key insights into the complex magnetic behavior of Sr4Ru3O10.
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