Magnetic Domain Walls and Macroscopic Magnetization-Related Elastic and Anelastic Effects during Premartensitic Transition in Ni2MnGa

Autor:	Sergey Kustov, Jaume Rosselló, Miguel Lluís Corró, Vladimir Kaminskii, Konstantin Sapozhnikov, Andrey Saren, Aleksei Sozinov, Kari Ullakko
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	elasticity anelasticity eddy currents Ni–Mn–Ga premartensite Technology Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Zdroj:	Materials, Vol 12, Iss 3, p 376 (2019)
Druh dokumentu:	article
ISSN:	1996-1944 12030376
DOI:	10.3390/ma12030376
Popis:	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 Ni2MnGa shape memory alloy close to the premartensitic transformation temperature, TPM, in the demagnetized state and under moderate fields. Several new effects observed like an apparent Young´s modulus softening close to TPM under moderate fields, instead of the hardening outside this range, as well as existing controversies in the apparent elastic and anelastic properties of Ni2MnGa close to TPM are explained by microeddy and macroeddy current relaxations that to date have been disregarded.
Databáze:	Directory of Open Access Journals
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