Structural and magnetic properties of iron doped ZrO2

Atomic layer deposition and properties of ZrO2/Fe2O3 thin films

“…Lamperti et al also determined the phase stabilization of ZrO 2 by Fe doping [ 17 ] or otherwise in an ozone-based ALD of ZrO 2 [ 32 ]. The stabilization of the tetragonal/cubic phase in Fe-doped ZrO 2 has been confirmed by de Souza et al [ 33 ] for samples fabricated by freeze-drying process and Kuryliszyn-Kudelska et al [ 34 ] for samples prepared via wet chemistry. For the samples grown on TiN substrates, films with a higher Fe 2 O 3 concentration did not show peaks assignable to any zirconia phase, but demonstrated reflections from crystallized Fe 2 O 3 in the monoclinic phase (PDF Card 016-0653) ( Fig.…”

“…In this study, saturative magnetization appeared in the samples heat treated above 250 °C and was recorded up to 500 °C, above which nonferromagnetic phases supposedly started to form. In other studies by de Souza et al [ 33 ], Kuryliszyn-Kudelska et al [ 34 ] and Okabayashi et al [ 10 ], only paramagnetic behavior in Fe-doped ZrO 2 was observed. One can note that, for example, in the work by Okabayashi et al [ 10 ], annealing was presumably required in order to initiate crystallization in sol–gel-synthesized (and therefore initially amorphous) films.…”

Solid-phase interaction in ZrO2-Fe2O3 nanocrystalline system

“…Interest in systems containing zirconium dioxide is caused by high refractory properties, strength, crack resistance, chemical inertness, superionic oxygen conductivity, biocompatibility, catalytic activity and other important characteristics of the materials, based on this substance [1,2]. Ceramic and composite materials, based on ZrO 2 -Fe 2 O 3 system, are widely used as catalysts or catalyst carriers for hydrocarbons isomerization, carbon monoxide hydrogenization, selective hydrogenation (Fischer-Tropsch reaction) and ammonia synthesis [3,4], as well as the magnetic materials [5,6].…”

“…Composition synthesis and subsequent study of their behavior during heating for ZrO 2 -Fe 2 O 3 system are generally realized with application of sol-gel synthesis followed by the annealing-quenching heat treatment of received precursors [16,[22][23][24][31][32][33]; hydrothermal synthesis [5]; thermal decomposition of iron (III) and zirconium salts [27]; ZrO 2 impregnating with aqueous solution of ferric (III) nitrate and subsequent drying and incineration [3,4]; solid-phase synthesis method [25,37]; reaction media burning method (solid-phase flame method, solution burning) [26,38,39], etc. [6,[34][35][36].…”

Spin-Glass Transitions in Zn1-xFexO Nanoparticles

“…In this paper, we report the results of an investigation on the Zn 1-x Fe x O system, prepared by freeze-drying an aqueous solution of zinc and iron acetate, followed by an appropriate heat treatment previously developed in our group. In fact, this method of synthesis was previously used successfully to prepare monophasic oxides doped with TM [9,10]. The Fe-doped ZnO samples were characterized by ordinary and synchrotron X-ray diffractometry (XRD), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), UV-VIS diffused reflectance spectroscopy, 57 Fe Mössbauer spectroscopy, and DC and AC magnetization techniques.…”