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Experimental exploration of dynamic phase transitions and associated metamagnetic fluctuations for materials with different Curie temperatures

dc.creatorMarín Ramírez J.M.
dc.creatorOblak E.
dc.creatorRiego P.
dc.creatorCampillo G.
dc.creatorOsorio J.
dc.creatorArnache O.
dc.creatorBerger A.
dc.date2020
dc.date.accessioned2021-02-05T14:58:14Z
dc.date.available2021-02-05T14:58:14Z
dc.identifier.issn24700045
dc.identifier.urihttp://hdl.handle.net/11407/5955
dc.descriptionWe study dynamic magnetic behavior in the vicinity of the dynamic phase transition (DPT) for a suitable series of samples that have different Curie temperatures TC, which thus enables us to experimentally explore the role of the reduced temperature T/TC in the DPT. For this purpose, we fabricate Co1-xRux epitaxial thin films with uniaxial in-plane anisotropy by means of sputter deposition in the concentration range 0.0≤x≤0.26. All samples are ferromagnetic at room temperature, exhibit an abrupt magnetization reversal along their easy axis, and represent a unique TC and thus T/TC ratio according to their Ru concentration. The dynamic magnetic behavior is measured by using an ultrasensitive transverse magneto-optical detection method and the resulting dynamic states are explored as a function of the applied magnetic field amplitude H0 and period P, as well as an additional bias field Hb, which is the conjugate field of the dynamic order parameter Q. Our experimental results demonstrate that the qualitative behavior of the dynamic phase diagram is independent of the T/TC ratio and that for all T/TC values we observe metamagnetic anomalies in the dynamic paramagnetic state, which do not exist in the corresponding thermodynamic phase diagram. However, quantitatively, these metamagnetic anomalies are very strongly dependent on the T/TC ratio, leading to an about 20-fold increase of large metamagnetic fluctuations in the paramagnetic regime as the T/TC ratio increases from 0.37 to 0.68. Also, the phase space range in which these anomalous metamagnetic fluctuations occur extends closer and closer to the critical point as T/TC increases. © 2020 American Physical Society.
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.isversionofhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85091192447&doi=10.1103%2fPhysRevE.102.022804&partnerID=40&md5=5f5160d4f93162351ffc3eeeeecc3b02
dc.sourcePhysical Review E
dc.titleExperimental exploration of dynamic phase transitions and associated metamagnetic fluctuations for materials with different Curie temperatures
dc.typeArticleeng
dc.rights.accessrightsinfo:eu-repo/semantics/restrictedAccess
dc.identifier.doi10.1103/PhysRevE.102.022804
dc.subject.keywordBinary alloyseng
dc.subject.keywordCobalt alloyseng
dc.subject.keywordCurie temperatureeng
dc.subject.keywordDepositioneng
dc.subject.keywordMagnetization reversaleng
dc.subject.keywordParamagnetismeng
dc.subject.keywordPhase diagramseng
dc.subject.keywordPhase space methodseng
dc.subject.keywordRuthenium alloyseng
dc.subject.keywordTemperatureeng
dc.subject.keywordTitrationeng
dc.subject.keywordApplied magnetic fieldseng
dc.subject.keywordConcentration rangeseng
dc.subject.keywordDynamic magnetic behavioreng
dc.subject.keywordDynamic phase diagrameng
dc.subject.keywordDynamic phase transitioneng
dc.subject.keywordEpitaxial thin filmseng
dc.subject.keywordMagneto-optical detectioneng
dc.subject.keywordQualitative behavioreng
dc.subject.keywordPhase transitionseng
dc.subject.keywordanisotropyeng
dc.subject.keywordarticleeng
dc.subject.keywordconcentration (parameter)eng
dc.subject.keywordconjugateeng
dc.subject.keywordCurie temperatureeng
dc.subject.keywordgene frequencyeng
dc.subject.keywordmagnetic fieldeng
dc.subject.keywordphase transitioneng
dc.subject.keywordroom temperatureeng
dc.subject.keywordsputter depositioneng
dc.relation.citationvolume102
dc.relation.citationissue2
dc.publisher.facultyFacultad de Ciencias Básicasspa
dc.affiliationMarín Ramírez, J.M., CIC NanoGUNE BRTA, Donostia - San Sebastián, 20018, Spain, Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Apartado Aéreo 1226, Medellín, Colombia
dc.affiliationOblak, E., CIC NanoGUNE BRTA, Donostia - San Sebastián, 20018, Spain
dc.affiliationRiego, P., CIC NanoGUNE BRTA, Donostia - San Sebastián, 20018, Spain, Departamento de Física de la Materia Condensada, Universidad Del País Vasco (UPV/EHU), Bilbao, 48080, Spain
dc.affiliationCampillo, G., Facultad de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
dc.affiliationOsorio, J., Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Apartado Aéreo 1226, Medellín, Colombia
dc.affiliationArnache, O., Instituto de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia, Apartado Aéreo 1226, Medellín, Colombia
dc.affiliationBerger, A., CIC NanoGUNE BRTA, Donostia - San Sebastián, 20018, Spain
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