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dc.creatorKrehula, Stjepko
dc.creatorRistić, Mira
dc.creatorKubuki, Shiro
dc.creatorIida, Yusuke
dc.creatorPerović, Marija M.
dc.creatorFabian, Martin
dc.creatorMusić, Svetozar
dc.identifier.issn0925-8388 (print)
dc.identifier.issn1873-4669 (electronic)
dc.description.abstractVarious mixed Fe-Ga oxides were prepared by the calcination of mixed Fe-Ga oxyhydroxide precursors (alpha-Fe1 xGaxOOH solid solutions, 0 LT = x LT = 1) at 500 or 1000 degrees C. Isostructural corundum-type oxides alpha-Fe2O3 and alpha-Ga2O3, as well as their solid solutions alpha-Fe-2 xGaxO3 in the entire concentration range (x = 0, 0.4, 1, 1.6 and 2) were prepared by calcination at 500 degrees C. An increase in the Ga content in alpha-Fe2 xGaxO3 resulted in a reduction of the unit cell size, a weakened hyperfine magnetic field, a disappearance of the Morin transition, an increase of magnetization at low temperatures, a shift in the position of IR bands to higher wavenumbers, and a lower intensity of absorption bands in the UV-Vis-NIR spectra. The calcination of Fe-Ga oxyhydroxides at 1000 degrees C resulted in the formation of a rhombohedral alpha-Fe-2 xGaxO3 phase for x = 0 and 0.4. An orthorhombic GaFeO3 phase with Fe3+ cations located in 3 different octahedral sites was obtained by the calcination at 1000 degrees C of mixed Fe-Ga oxyhydroxide with the Fe:Ga ratio of 1:1. A monoclinic phase b-Fe-2 xGaxO3 (x = 1.6 and 2) was obtained by the calcination at 1000 degrees C of Fe-Ga oxyhydroxides with 80 and 100 mol% Ga. The monoclinic beta-Ga1.6Fe0.4O3 showed two strong luminescence peaks in the blue region of the PL spectrum. (C) 2015 Elsevier B.V. All rights reserved.en
dc.relationCroatian Centre of Excellence for Advanced Materials and Sensing Devices
dc.sourceJournal of Alloys and Compoundsen
dc.subjectMossbauer spectroscopyen
dc.titleSynthesis and microstructural properties of mixed iron-gallium oxidesen
dcterms.abstractРистиц, Мира; Мусиц, Светозар; Крехула, Стјепко; Перовић Марија; Кубуки, Схиро; Иида, Yусуке; Фабиан, Мартин;

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