Roles of hydrogenation, annealing and field in the structure and magnetic entropy change of Tb-based bulk metallic glasses

dc.bibliographicCitation.issue3eng
dc.bibliographicCitation.volume3
dc.contributor.authorLuo, Qiang
dc.contributor.authorSchwarz, Björn
dc.contributor.authorMattern, Norbert
dc.contributor.authorShen, Jun
dc.contributor.authorEckert, Jürgen
dc.date.accessioned2018-05-22T21:17:30Z
dc.date.available2019-06-28T07:30:57Z
dc.date.issued2013
dc.description.abstractThe reduction of open-volume regions in Tb-based metallic glass (MG) by annealing and hydrogen charging was found to rearrange the atomic structure and tune the magnetic behaviors. After crystallization, the magnetic structure and magnetic entropy change (MEC) alters due to the structural transformation, and a plateau-like-MEC behavior can be obtained. The hydrogen concentration after charging at 1mA/cm2 for 576 h reaches as high as 3290 w-ppm. The magnetization behavior and the MEC change due to the modification of the exchange interaction and the random magnetic anisotropy (RMA) upon hydrogenation. At low temperatures, irreversible positive MEC was obtained, which is related to the internal entropy production. The RMA-to-exchange ratio acts as a switch to control the irreversible entropy production channel and the reversible entropy transfer channel. The field dependence of the MEC is discussed in term of the competition among Zeeman energy, exchange interaction and RMA.
dc.description.versionpublishedVersioneng
dc.formatapplication/pdf
dc.identifier.urihttps://doi.org/10.34657/4894
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/1392
dc.language.isoengeng
dc.publisherNew York : American Institute of Physics
dc.relation.doihttps://doi.org/10.1063/1.4797619
dc.relation.ispartofseriesAIP Advances, Volume 3, Issue 3eng
dc.rights.licenseCC BY 3.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/eng
dc.subjectX-ray diffraction
dc.subjectAmorphous metals
dc.subjectAmorphous state
dc.subjectCrystal structure
dc.subjectCharged currents
dc.subjectCrystallization
dc.subjectEntropy
dc.subjectAmorphous magnetic materials
dc.subjectAnnealing
dc.subjectGlass transitions
dc.subject.ddc620
dc.titleRoles of hydrogenation, annealing and field in the structure and magnetic entropy change of Tb-based bulk metallic glasses
dc.typearticleeng
dc.typeTexteng
dcterms.bibliographicCitation.journalTitleAIP Advanceseng
tib.accessRightsopenAccesseng
wgl.contributorIFWDeng
wgl.subjectIngenieurwissenschafteneng
wgl.typeZeitschriftenartikeleng
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