RT info:eu-repo/semantics/article
T1 Unexpected wide tuning of ferroelectric properties by varying the Er concentration in La2-xErx(MoO4)3 (x = 0.75, 1, 1.25) solid solutions
A1 Torres Betancort, Manuel Eulalio
A1 Gil de Cos, G.
K1 Inorganic compounds; Crystal structure; Dielectric properties; Ferroelectricity; Phasetransitions
AB PowdersamplesoftheseriesLa2-xErx(MoO4)3(x¼0.75,1,1.25)werepreparedbysolid-statereactionfromthe LaandErtrimolybdates.Thecorrelationoftheferroelectricpropertieswiththecrystalstructure,asafunctionof thexconcentration,wasstudiedbyX-raydiffraction(XRD),dielectricandoptical spectroscopy,andtheferroelectrichysteresis loopmeasurements.Theβ0-Gd2(MoO4)3structuretypewas identifiedbyanon-conventional Rietveldmethod, includingasymmetryanalysis.Contrarytotheexpectations, theferroelectricpropertieswere intensifiedby theEr3þconcentration increase: themaximumpolarization forx¼1.25reachesoneorderof magnitudelargerthanthatofx¼0.75,andtheCurietemperatureincreasewasaround200K.Thisunexpected behavior isoppositeof thatobservedfortheimproperferroelectricsRE2(MoO4)3,wheretheferroelectricpropertiesareenhancedwiththeREionicradiusincrease.Hence, theseriesLa2-xErx(MoO4)3showan“widertuning range”forferroelectricpropertiesoppositetotherareearthtrimolybdatefamily
SN 0022-4596
YR 2022
FD 2022
LK http://riull.ull.es/xmlui/handle/915/34897
UL http://riull.ull.es/xmlui/handle/915/34897
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 22-nov-2024