Determination of domain wall chirality using in situ Lorentz transmission electron microscopy
Abstract
Controlling domain wall chirality is increasingly seen in non-centrosymmetric materials. Mapping chiral magnetic domains requires knowledge about all the vector components of the magnetization, which poses a problem for conventional Lorentz transmission electron microscopy (LTEM) that is only sensitive to magnetic fields perpendicular to the electron beams direction of travel. The standard approach in LTEM for determining the third component of the magnetization is to tilt the sample to some angle and record a second image. Furthermore, this presents a problem for any domain structures that are stabilized by an applied external magnetic field (e.g. skyrmions), because the standard LTEM setup does not allow independent control of the angle of an applied magnetic field, and sample tilt angle. Here we show that applying a modified transport of intensity equation analysis to LTEM images collected during an applied field sweep, we can determine the domain wall chirality of labyrinth domains in a perpendicularly magnetized material, avoiding the need to tilt the sample.
- Authors:
-
- Department of Physics, University of Oregon, Eugene, Oregon 97403, USA
- Center for Memory and Recording Research, University of California, San Diego, California 92093, USA, Department of Electrical and Computer Engineering, University of California, San Diego, La Jolla, California 92093, USA
- Publication Date:
- Research Org.:
- Univ. of Oregon, Eugene, OR (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1349368
- Alternate Identifier(s):
- OSTI ID: 1393529; OSTI ID: 1421279
- Grant/Contract Number:
- SC0003678; SC0010466
- Resource Type:
- Published Article
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Name: AIP Advances Journal Volume: 7 Journal Issue: 5; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Domain walls; Chiral symmetries; Magnetic fields; Magnetic induction; Nucleation
Citation Formats
Chess, Jordan J., Montoya, Sergio A., Fullerton, Eric E., and McMorran, Benjamin J. Determination of domain wall chirality using in situ Lorentz transmission electron microscopy. United States: N. p., 2017.
Web. doi:10.1063/1.4977500.
Chess, Jordan J., Montoya, Sergio A., Fullerton, Eric E., & McMorran, Benjamin J. Determination of domain wall chirality using in situ Lorentz transmission electron microscopy. United States. https://doi.org/10.1063/1.4977500
Chess, Jordan J., Montoya, Sergio A., Fullerton, Eric E., and McMorran, Benjamin J. Thu .
"Determination of domain wall chirality using in situ Lorentz transmission electron microscopy". United States. https://doi.org/10.1063/1.4977500.
@article{osti_1349368,
title = {Determination of domain wall chirality using in situ Lorentz transmission electron microscopy},
author = {Chess, Jordan J. and Montoya, Sergio A. and Fullerton, Eric E. and McMorran, Benjamin J.},
abstractNote = {Controlling domain wall chirality is increasingly seen in non-centrosymmetric materials. Mapping chiral magnetic domains requires knowledge about all the vector components of the magnetization, which poses a problem for conventional Lorentz transmission electron microscopy (LTEM) that is only sensitive to magnetic fields perpendicular to the electron beams direction of travel. The standard approach in LTEM for determining the third component of the magnetization is to tilt the sample to some angle and record a second image. Furthermore, this presents a problem for any domain structures that are stabilized by an applied external magnetic field (e.g. skyrmions), because the standard LTEM setup does not allow independent control of the angle of an applied magnetic field, and sample tilt angle. Here we show that applying a modified transport of intensity equation analysis to LTEM images collected during an applied field sweep, we can determine the domain wall chirality of labyrinth domains in a perpendicularly magnetized material, avoiding the need to tilt the sample.},
doi = {10.1063/1.4977500},
journal = {AIP Advances},
number = 5,
volume = 7,
place = {United States},
year = {Thu Feb 23 00:00:00 EST 2017},
month = {Thu Feb 23 00:00:00 EST 2017}
}
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https://doi.org/10.1063/1.4977500
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