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PALS investigation of structural vacancies during phase transitions in Fe-27Ga and Fe-27Ga-0.1Tb alloys

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dc.contributor.authorGolovin, I. S.
dc.contributor.authorPalacheva, V. V.
dc.contributor.authorDubov, L. Y.
dc.contributor.authorShtotsky, Y. V.
dc.contributor.authorStepanov, S. V.
dc.contributor.authorAkmalova, Y. A.
dc.contributor.authorДубов, Леонид Юрьевич
dc.contributor.authorШтоцкий, Юрий Владимирович
dc.contributor.authorСтепанов, Сергей Всеволодович
dc.contributor.authorАкмалова, Юлия Альфредовна
dc.date.accessioned2024-11-21T17:00:56Z
dc.date.available2024-11-21T17:00:56Z
dc.date.issued2019
dc.description.abstract© 2019 Author(s).Good mechanical properties and relatively low switching magnetic field make Fe-Ga alloys very useful magnetostrictive material for wide range of practical applications. Doping with rare-earth elements (such as Tb) can significantly increase magnetostriction, because Tb rearranges vacancy structure during phase transitions in Fe-27Ga alloys. It was found that A2 and D03 structures in Fe-27Ga have high density of Fe-monovacancies with the positron lifetime ≈180 ps regardless of the presence of Tb. Transition into L12 structure is accompanied by formation of a significant number of larger vacancy defects, which increases the e+ lifetime by 5 %. Addition of 0.2% Tb suppress formation of these large defects at annealing temperatures of 400-550°C. Presence of Tb also decreases concentration of vacancies in D019 structure. After annealing at 650°C D019 volume fraction in Fe-27Ga-0.2Tb decreases to 60 %, (according to the positron measurements) against 95 % in Fe-27Ga. In both alloys at 700°C number of monovacancies increases dramatically during formation of the bcc B2 phase.
dc.identifier.citationPALS investigation of structural vacancies during phase transitions in Fe-27Ga and Fe-27Ga-0.1Tb alloys / Golovin, I.S. [et al.] // AIP Conference Proceedings. - 2019. - 2182. - 10.1063/1.5135858
dc.identifier.doi10.1063/1.5135858
dc.identifier.urihttps://www.doi.org/10.1063/1.5135858
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85077868850&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000598537700037
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/19267
dc.relation.ispartofAIP Conference Proceedings
dc.titlePALS investigation of structural vacancies during phase transitions in Fe-27Ga and Fe-27Ga-0.1Tb alloys
dc.typeConference Paper
dspace.entity.typePublication
oaire.citation.volume2182
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