Issue 27, 2020

Dynamics of chiral state transitions and relaxations in an FeGe thin plate via in situ Lorentz microscopy

Abstract

Studying the magnetic transition between different topological spin textures in noncentrosymmetric magnets under external stimuli is an important topic in chiral magnetism. Here, using in situ Lorentz transmission electron microscopy (LTEM) we directly visualize the thermal-driven magnetic transitions and dynamic characteristics in FeGe thin plates. A novel protocol-dependent phase diagram of FeGe thin plates was obtained via pulsed laser excitation. Moreover, by setting the appropriate specimen temperature, the relaxation of chiral magnetic states in FeGe specimens was recorded and analyzed with an Arrhenius-type relaxation mechanism. We present the field-dependent activation energy barriers for chiral state transitions and the magnetic transition pathways of these spin textures for FeGe thin plates. Our results unveil the effects of thermal excitation on the topological spin texture transitions and provide useful information about magnetic dynamics of chiral magnetic state relaxation.

Graphical abstract: Dynamics of chiral state transitions and relaxations in an FeGe thin plate via in situ Lorentz microscopy

Supplementary files

Article information

Article type
Paper
Submitted
27 Apr 2020
Accepted
25 Jun 2020
First published
03 Jul 2020

Nanoscale, 2020,12, 14919-14925

Dynamics of chiral state transitions and relaxations in an FeGe thin plate via in situ Lorentz microscopy

K. Chai, Z. Li, R. Liu, B. Zou, M. Farle and J. Li, Nanoscale, 2020, 12, 14919 DOI: 10.1039/D0NR03278F

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