Effect of magnetostatic interactions on twin boundary motion in Ni-Mn-Ga magnetic shape memory alloy
Result description
We investigated the effect of magnetostatic interactions on the field-induced reorientation of martensite variants in Ni 50.0 Mn 27.5 Ga 22.5 . The reorientation, achieved by sweeping a single Type-II twin boundary along the sample, was triggered by a twinning stress of about 0.1 MPa. However, depending on the initial position of the twin boundary, the magnetic field providing the critical stress varied in the range 8?32 kA/m. By taking into account the variants sizes and their mutual interactions, we explained the observed dependence of the switching field on the location of the boundary. The resulting match between model predictions and measurements illustrates the fundamental role played by demagnetization effects and magnetostatic interactions in magnetic shape memory effect.
Keywords
magnetism in solidsdemagnetization factorsmagnetostatic interactionsshape memory alloys
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Effect of magnetostatic interactions on twin boundary motion in Ni-Mn-Ga magnetic shape memory alloy
Original language description
We investigated the effect of magnetostatic interactions on the field-induced reorientation of martensite variants in Ni 50.0 Mn 27.5 Ga 22.5 . The reorientation, achieved by sweeping a single Type-II twin boundary along the sample, was triggered by a twinning stress of about 0.1 MPa. However, depending on the initial position of the twin boundary, the magnetic field providing the critical stress varied in the range 8?32 kA/m. By taking into account the variants sizes and their mutual interactions, we explained the observed dependence of the switching field on the location of the boundary. The resulting match between model predictions and measurements illustrates the fundamental role played by demagnetization effects and magnetostatic interactions in magnetic shape memory effect.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
IEEE Magnetics Letters
ISSN
1949-307X
e-ISSN
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Volume of the periodical
6
Issue of the periodical within the volume
Jul
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
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UT code for WoS article
000359254700001
EID of the result in the Scopus database
2-s2.0-84938702211
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
BM - Solid-state physics and magnetism
Year of implementation
2015