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Suppression of magnetostructural transition on GdSiGe thin film after thermal cyclings

TitleSuppression of magnetostructural transition on GdSiGe thin film after thermal cyclings
Publication TypeJournal Article
Year of Publication2017
AuthorsPires, AL, Belo, JH, Gomes, IT, Hadimani, RL, Schlagel, DL, Lograsso, TA, Jiles, DC, Lopes, AML, Araujo, JP, Pereira, AM
JournalThin Solid Films
Volume621
Pagination247-252
Date Published01
Type of ArticleArticle
ISBN Number0040-6090
Accession NumberWOS:000392681900037
Keywordsbehavior, bulk, compound, gd-5(si0.1ge0.9)(4), gd5si2ge2, hysteresis, Magnetocaloric effect, magnetocaloric materials, Materials Science, Microstructure, physics, refrigeration, system, temperature, Thermal cycling, Thin films
Abstract

The influence of thermal cycling on the microstructure, magnetic phase transition and magnetic entropy change of a Gd5Si1.3Ge2.7 thin film up to 1000 cycles is investigated. The authors found that after 1000 cycles a strong reduction of the crystallographic phase responsible for the magnetostructural transition (Orthorhombic II phase) occurs. This is attributed to chemical disorder, caused by the large number of expansion/compression cycles that the Orthorhombic II phase undergoes across the magnetostructural transition. The suppression of the magnetostructural transition corresponds to a drastic decrease of the thin film magnetic entropy change. These results reveal the importance of studying the thermal/magnetic cycles influence on magnetostructural transitions as they can damage a real-life device. (C) 2016 Elsevier B.V. All rights reserved.

DOI10.1016/j.tsf.2016.09.013
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Short TitleThin Solid Films
Alternate JournalThin Solid Films