Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa

The temperature and field dependences of internal friction and Young’s modulus are studied using a high-resolution ultrasonic (90 kHz) technique in stoichiometric ferromagnetic Ni(2)MnGa shape memory alloy close to the premartensitic transformation temperature, T(PM), in the demagnetized state and u...

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Autores principales: Kustov, Sergey, Rosselló, Jaume, Corró, Miguel Lluís, Kaminskii, Vladimir, Sapozhnikov, Konstantin, Saren, Andrey, Sozinov, Aleksei, Ullakko, Kari
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384950/
https://www.ncbi.nlm.nih.gov/pubmed/30691045
http://dx.doi.org/10.3390/ma12030376
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author Kustov, Sergey
Rosselló, Jaume
Corró, Miguel Lluís
Kaminskii, Vladimir
Sapozhnikov, Konstantin
Saren, Andrey
Sozinov, Aleksei
Ullakko, Kari
author_facet Kustov, Sergey
Rosselló, Jaume
Corró, Miguel Lluís
Kaminskii, Vladimir
Sapozhnikov, Konstantin
Saren, Andrey
Sozinov, Aleksei
Ullakko, Kari
author_sort Kustov, Sergey
collection PubMed
description The temperature and field dependences of internal friction and Young’s modulus are studied using a high-resolution ultrasonic (90 kHz) technique in stoichiometric ferromagnetic Ni(2)MnGa shape memory alloy close to the premartensitic transformation temperature, T(PM), in the demagnetized state and under moderate fields. Several new effects observed like an apparent Young´s modulus softening close to T(PM) under moderate fields, instead of the hardening outside this range, as well as existing controversies in the apparent elastic and anelastic properties of Ni(2)MnGa close to T(PM) are explained by microeddy and macroeddy current relaxations that to date have been disregarded.
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spelling pubmed-63849502019-02-23 Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa Kustov, Sergey Rosselló, Jaume Corró, Miguel Lluís Kaminskii, Vladimir Sapozhnikov, Konstantin Saren, Andrey Sozinov, Aleksei Ullakko, Kari Materials (Basel) Article The temperature and field dependences of internal friction and Young’s modulus are studied using a high-resolution ultrasonic (90 kHz) technique in stoichiometric ferromagnetic Ni(2)MnGa shape memory alloy close to the premartensitic transformation temperature, T(PM), in the demagnetized state and under moderate fields. Several new effects observed like an apparent Young´s modulus softening close to T(PM) under moderate fields, instead of the hardening outside this range, as well as existing controversies in the apparent elastic and anelastic properties of Ni(2)MnGa close to T(PM) are explained by microeddy and macroeddy current relaxations that to date have been disregarded. MDPI 2019-01-25 /pmc/articles/PMC6384950/ /pubmed/30691045 http://dx.doi.org/10.3390/ma12030376 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kustov, Sergey
Rosselló, Jaume
Corró, Miguel Lluís
Kaminskii, Vladimir
Sapozhnikov, Konstantin
Saren, Andrey
Sozinov, Aleksei
Ullakko, Kari
Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa
title Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa
title_full Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa
title_fullStr Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa
title_full_unstemmed Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa
title_short Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni(2)MnGa
title_sort magnetic domain walls and macroscopic magnetization-related elastic and anelastic effects during premartensitic transition in ni(2)mnga
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6384950/
https://www.ncbi.nlm.nih.gov/pubmed/30691045
http://dx.doi.org/10.3390/ma12030376
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