mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-110Research ArticleСтатьиElectron paramagnetic resonance and X-ray diffraction study of PbF2 fine powders mechanochemically doped with Er3+ ionsIrisovaI. A.

Kremlevskaya 18, Kazan 420008

IAIrisova@kpfu.ruGrachevaI. N.

Kremlevskaya 18, Kazan 420008

LysogorskiyY. V.

Kremlevskaya 18, Kazan 420008

ShinkarevA. A.

K. Marx str. 68, 420015 Kazan

RodionovA. A.

Kremlevskaya 18, Kazan 420008

TayurskiiD. A.

Kremlevskaya 18, Kazan 420008

YusupovR. V.

Kremlevskaya 18, Kazan 420008

Kazan Federal UniversityRussian FederationKazan National Research Technological UniversityRussian Federation20173012201719217209 (9 pp.)Copyright © Irisova I.A., Gracheva I.N., Lysogorskiy Y.V., Shinkarev A.A., Rodionov A.A., Tayurskii D.A., Yusupov R.V., 20242024Irisova I.A., Gracheva I.N., Lysogorskiy Y.V., Shinkarev A.A., Rodionov A.A., Tayurskii D.A., Yusupov R.V.Irisova I.A., Gracheva I.N., Lysogorskiy Y.V., Shinkarev A.A., Rodionov A.A., Tayurskii D.A., Yusupov R.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/110

Investigation of the mechanochemical doping of PbF2 powders with Er3+ ions with electron paramagnetic resonance and X-ray diffraction is presented. In the analysis of the results a possibility of the structural transformation between the cubic β-PbF2 and orthorhombic α-PbF2 phases in the course of synthesis was taken into account. It is shown that regardless of the initial state of PbF2 it reveals high efficiency of the mechanochemical doping with Er3+ ions. Obtained particles are found in (α/β)-PbF2 structurally inhomogeneous state with the majority of the Er3+ ions located in the equilibrium α-PbF2 fraction. Preferrable location of the Er3+ ions in the α-PbF2 phase is related to the fact that the formation of the cation vacancies necessary for a mechanically activated diffusion of erbium ions into the particles and nucleation of the α-PbF2 phase proceed in parallel and is mediated by dislocations created in the course of synthesis. Annealing of the sample leads to a conversion of its entire volume into the metastable β-PbF2 phase with all the Er3+ centers possessing the cubic symmetry.

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The authors declare that there are no conflicts of interest present.