Influence of the magnetovolume effect on the transient reflectivity of MnSi

authored by
J. Kalin, S. Sievers, H. w. Schumacher, H. Füser, M. Bieler, A. Bauer, C. Pfleiderer
Abstract

The magnetovolume effect is a well established yet frequently overlooked phenomenon in magnetic materials that may affect a wide range of physical properties. Our study explores the influence of the magnetovolume effect on the transient reflectivity of MnSi, a well-known chiral magnet with strong magnetoelastic coupling. We observe a unipolar reflectivity transient in the paramagnetic phase, contrasting with a bipolar response in phases with magnetic long-range order. Comparing our findings with thermal expansion from literature, we establish that the bipolar response originates in the magnetovolume effect which dominates the thermal expansion and influences the optical reflectivity. Our results highlight not only that the magnetovolume effect must be considered when discussing transient reflectivity measurements of magnetic materials but also that such measurements permit to study the characteristic time scales of the magnetovolume effect itself, contributing to a deeper understanding of this often-neglected phenomenon.

External Organisation(s)
National Metrology Institute of Germany (PTB)
Type
Article
Journal
Physical Review B
Volume
110
ISSN
2469-9950
Publication date
11.07.2024
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Electronic version(s)
https://link.aps.org/doi/10.1103/PhysRevB.110.014415 (Access: Unknown)
https://doi.org/10.1103/PhysRevB.110.014415 (Access: Open)