ABSTRACT We carried out a systematic study on the effect of the substitution of Ti2+ and Ru4+ ion... more ABSTRACT We carried out a systematic study on the effect of the substitution of Ti2+ and Ru4+ ions for Fe3+ ions on the structural and magnetic properties of the strontium ferrite SrFe12-2xRuxTixO19 nanoparticles with (0 ≤ x ≤ 0.3), using x-ray diffraction, Quantum Design PPMS-9 magnetometry, and electrical resistivity. A clear irreversibility between the zero-field-cooled and field-cooled curves was observed below room temperature and the zero-field-cooled magnetization curves displayed a broad peak at a temperature TM. These results were discussed within the framework of random particle assembly model and associated with the magnetic domain wall motion. The resistivity data showed some kind of a transition from insulator to perfect insulator around TM. The high-temperature magnetization measurements exhibited sharp peaks just below Tc indicating a superparamagnetic behavior. With Ru-Ti substitution, the saturation magnetization at 5 K showed small variations were it slightly increased with increasing x up to 0.2, and then decrease for x = 0.3, while the coercivity decreased monotonically, recording a reduction of about 78% at x = 0.3. These results were discussed in light of the cationic distributions based on the results of the structural refinements.
fullprof refinement, full structural information based on Rietveld refinement of XRD pattern cont... more fullprof refinement, full structural information based on Rietveld refinement of XRD pattern contains M-type barium hexaferrite (BaFe12O19) as a main phase, and Hematite (a-Fe2O3) as a secondary phase. to download, right click on the dataset picture and save link as..
The main essence of this study is about the structural analysis of barium hexaferrite material, b... more The main essence of this study is about the structural analysis of barium hexaferrite material, based on XRD pattern fitting using Rietveld refinement. Our methodology start by preparing a samples of barium iron oxide materials, with different stoichiometric ratios, under different laboratory conditions. In an attempt to understand the formation of barium hexaferrite phases, in order to synthesis a pure phase of M-type barium hexaferrite (BaFe12O19). As well as to understand the effect of temperature and impurities on the resulted phases. In the beginning, a precursor material was prepared in order to obtain M-type barium hexaferrite (BaFe12O19) samples, and modifying the proportion of Fe:Ba ratio in each sample ascending from (11.5) to (16:16), for five samples and synthesizing them under the same laboratory conditions. The analysis of these samples shows that the M-type barium hexa ferrite was not affected structurally or quantitatively, and the increase of the iron oxide quantity...
ABSTRACT We carried out a systematic study on the effect of the substitution of Ti2+ and Ru4+ ion... more ABSTRACT We carried out a systematic study on the effect of the substitution of Ti2+ and Ru4+ ions for Fe3+ ions on the structural and magnetic properties of the strontium ferrite SrFe12-2xRuxTixO19 nanoparticles with (0 ≤ x ≤ 0.3), using x-ray diffraction, Quantum Design PPMS-9 magnetometry, and electrical resistivity. A clear irreversibility between the zero-field-cooled and field-cooled curves was observed below room temperature and the zero-field-cooled magnetization curves displayed a broad peak at a temperature TM. These results were discussed within the framework of random particle assembly model and associated with the magnetic domain wall motion. The resistivity data showed some kind of a transition from insulator to perfect insulator around TM. The high-temperature magnetization measurements exhibited sharp peaks just below Tc indicating a superparamagnetic behavior. With Ru-Ti substitution, the saturation magnetization at 5 K showed small variations were it slightly increased with increasing x up to 0.2, and then decrease for x = 0.3, while the coercivity decreased monotonically, recording a reduction of about 78% at x = 0.3. These results were discussed in light of the cationic distributions based on the results of the structural refinements.
fullprof refinement, full structural information based on Rietveld refinement of XRD pattern cont... more fullprof refinement, full structural information based on Rietveld refinement of XRD pattern contains M-type barium hexaferrite (BaFe12O19) as a main phase, and Hematite (a-Fe2O3) as a secondary phase. to download, right click on the dataset picture and save link as..
The main essence of this study is about the structural analysis of barium hexaferrite material, b... more The main essence of this study is about the structural analysis of barium hexaferrite material, based on XRD pattern fitting using Rietveld refinement. Our methodology start by preparing a samples of barium iron oxide materials, with different stoichiometric ratios, under different laboratory conditions. In an attempt to understand the formation of barium hexaferrite phases, in order to synthesis a pure phase of M-type barium hexaferrite (BaFe12O19). As well as to understand the effect of temperature and impurities on the resulted phases. In the beginning, a precursor material was prepared in order to obtain M-type barium hexaferrite (BaFe12O19) samples, and modifying the proportion of Fe:Ba ratio in each sample ascending from (11.5) to (16:16), for five samples and synthesizing them under the same laboratory conditions. The analysis of these samples shows that the M-type barium hexa ferrite was not affected structurally or quantitatively, and the increase of the iron oxide quantity...
Uploads
Papers by Yazan Maswadeh