Evolution from 4f-electron antiferromagnetic to ferromagnetic order in the CeCu(Ge1-xSnx) alloy series (0≤x≤1)

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dc.contributor.authorAltayeb, Anas
dc.contributor.authorSondezi, B. M.
dc.contributor.authorTchoula Tchokonte, Moise
dc.contributor.authorStrydom, A. M.
dc.contributor.authorDoyle, T. B.
dc.contributor.authorKaczorowski, D.
dc.date.accessioned2017-03-10T08:01:23Z
dc.date.available2017-03-10T08:01:23Z
dc.date.issued2017
dc.description.abstractWe report the evolution from ferromagnetic (FM) to antiferromagnetic (AFM) state in CeCu(Ge1-xSnx) investigated by means of magnetic and heat capacity measurements. X-ray diffraction studies for all compositions indicate the ZrBeSi - type hexagonal crystal structure with space group P63/mmc (No. 194). The magnetic susceptibility, x(T) at high temperature follows the Curie - Weiss relation with an effective magnetic moment close to the value of 2.54 µB expected for free Ce3+ - ion. At low temperatures, x(T) data indicate AFM transition for alloys in the concentration range 0.7≤x≤1 and FM for x≤0.6. The magnetization, M(µ0H) of samples exhibiting AFM behaviour shows metamagnetic transition at low magnetic fields with some irreversibility in the process of increasing and decreasing magnetic field. In turn, M(µ0H) of samples exhibiting FM behaviour shows saturation in high magnetic fields. Heat capacity, Cp(T) data confirm the AFM and FM transitions observed in magnetic measurements. An additional anomaly below TC and TN is observed in Cp(T)/T, which likely arises from spin reorientation or rearrangement in FM or AFM structure. Below in FM region, Cp(T) can be well described assuming spin-waves excitations with an energy gap ∆C.en_US
dc.description.accreditationScopusen_US
dc.identifier.citationAltayeb, A. et al. (2017). Evolution from 4f-electron antiferromagnetic to ferromagnetic order in the CeCu(Ge1-xSnx) alloy series (0≤x≤1). AIP Advances, 7(5): Art. #55714en_US
dc.identifier.issn2158-3226
dc.identifier.urihttp://hdl.handle.net/10566/2616
dc.identifier.urihttp://dx.doi.org/10.1063/1.4977019
dc.language.isoenen_US
dc.privacy.showsubmitterFALSE
dc.publisherAmerican Institute of Physics Inc.en_US
dc.rights© 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
dc.status.ispeerreviewedTRUE
dc.subjectAntiferromagnetismen_US
dc.subjectFerromagnetic materialsen_US
dc.subjectFerromagnetismen_US
dc.subjectMagnetic fieldsen_US
dc.subjectPolycrystalline materialsen_US
dc.subjectSpecific heaten_US
dc.subjectX ray diffractionen_US
dc.subjectAntiferromagnetic stateen_US
dc.subjectEffective magnetic momentsen_US
dc.subjectHeat capacity measurementsen_US
dc.subjectHexagonal crystal structureen_US
dc.subjectMetamagnetic transitionsen_US
dc.subjectMagnetismen_US
dc.titleEvolution from 4f-electron antiferromagnetic to ferromagnetic order in the CeCu(Ge1-xSnx) alloy series (0≤x≤1)en_US
dc.typeArticleen_US

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