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001037141 1001_ $$0P:(DE-HGF)0$$aGilson, Sara E.$$b0$$eCorresponding author
001037141 245__ $$aMicrostructural investigation of Au ion-irradiated Eu-doped LaPO4 ceramics and single crystals
001037141 260__ $$a[London]$$bMacmillan Publishers Limited, part of Springer Nature$$c2024
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001037141 520__ $$aCeramics and single crystals of LaPO4 monazite doped with Eu(III) were irradiated with 14 MeV Au5+ ions at three different fluences. Changes to crystallinity, local coordination environments, and topography were probed using grazing-incidence X-ray diffraction (GIXRD), vertical scanning interferometry (VSI), scanning electron microscopy (SEM), Raman, and luminescence spectroscopy. GIXRD data of the ceramics revealed fluence dependent amorphization. A similar level of amorphization was detected for samples irradiated with 5 × 1013 ions/cm2 and 1 × 1014 ions/cm2, whereas the sample irradiated with the highest fluence of 1 × 1015 ions/cm2 appeared slightly less amorphous. VSI showed clear swelling of entire grains at the highest ion fluence, while more localized damage to grain boundaries was detected for ceramic samples irradiated at the lowest fluence. Single crystal specimens showed no pronounced topography changes following irradiation. SEM images of the ceramic irradiated at the highest fluence showed topological features indicative of grain surface melting. Raman and luminescence data showed a different degree of disorder in polycrystalline vs. single crystal samples. While changes to PO4 vibrational modes were observed in the ceramics, changes were more subtle or not present in the single crystals. The opposite was observed when probing the local Ln-O environment using Eu(III) luminescence, where the larger changes in terms of an elongation of the Eu-O (or La-O) bond and an increasing relative disorder with increasing fluence were observed only for the single crystals. The dissimilar trends observed in irradiated single crystals and ceramics indicate that grain boundary chemistry likely plays a significant role in the radiation response.
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001037141 7001_ $$0P:(DE-HGF)0$$aSvitlyk, Volodymyr$$b1
001037141 7001_ $$0P:(DE-Juel1)130329$$aBukaemskiy, Andrey A.$$b2$$ufzj
001037141 7001_ $$0P:(DE-HGF)0$$aNiessen, Jonas$$b3
001037141 7001_ $$0P:(DE-HGF)0$$aLender, Theresa$$b4
001037141 7001_ $$0P:(DE-Juel1)176900$$aMurphy, Gabriel L.$$b5$$ufzj
001037141 7001_ $$0P:(DE-Juel1)176390$$aHenkes, Maximilian$$b6$$ufzj
001037141 7001_ $$00000-0002-8896-7595$$aLippold, Holger$$b7
001037141 7001_ $$00000-0001-8571-1191$$aMarquardt, Julien$$b8
001037141 7001_ $$0P:(DE-HGF)0$$aAkhmadaliev, Shavkat$$b9
001037141 7001_ $$0P:(DE-HGF)0$$aHennig, Christoph$$b10
001037141 7001_ $$0P:(DE-HGF)0$$aWinkler, Bjoern$$b11
001037141 7001_ $$0P:(DE-HGF)0$$aTonnesen, Thorsten$$b12
001037141 7001_ $$00000-0002-4677-850X$$aPeters, Lars$$b13
001037141 7001_ $$00000-0003-2416-6438$$aFischer, Cornelius$$b14
001037141 7001_ $$0P:(DE-HGF)0$$aHuittinen, Nina$$b15$$eCorresponding author
001037141 773__ $$0PERI:(DE-600)2925488-7$$a10.1038/s41529-024-00504-3$$gVol. 8, no. 1, p. 83$$n1$$p83$$tnpj Materials degradation$$v8$$x2397-2106$$y2024
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