A5073260272- ZnO doping and properties
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Magnetic Properties and Synthesis of Ferrites
- Iron oxide chemistry and applications
- Phase-change materials and chalcogenides
- Quantum Dots Synthesis And Properties
- Advancements in Battery Materials
- Supercapacitor Materials and Fabrication
- Semiconductor Quantum Structures and Devices
- Transition Metal Oxide Nanomaterials
- Heusler alloys: electronic and magnetic properties
- Carbon Nanotubes in Composites
- Advanced Battery Technologies Research
- Laser-Ablation Synthesis of Nanoparticles
- Graphene research and applications
- Silicon Carbide Semiconductor Technologies
- Advanced Condensed Matter Physics
- Chalcogenide Semiconductor Thin Films
- Advanced Battery Materials and Technologies
- Magnetic Properties of Alloys
- Catalytic Processes in Materials Science
- Acoustic Wave Resonator Technologies
Polish Academy of Sciences
2013-2023
Institute of Physics
2008-2020
Nanocrystalline samples of ZnO(Fe) were synthesized by wet chemical method.Samples characterized X-ray diffraction to determine composition the (ZnO, Fe2O3, ZnFe2O4) and mean crystalline size (8-52 nm).In this paper we report experimental spectra Raman scattering (from 200 1600 cm -1 ).Main characteristics spectrum in spectral region are: sharp peak at 436 broad two-phonon structure ≈ 1150 , typical ZnO; below 700 that has different position shape case ZnFe 2 O 4 or Fe 3 nanoparticles.
Structural investigation of as-grown as well annealed Ga(1-x)Mn(x)As epilayers was carried out using high resolution X-ray diffraction (XRD) measurements for a wide range Mn concentrations (0.027<=x<=0.083), with special attention on how the interstitial atoms (Mn_I) influence lattice parameter this material. We observe distinct decrease after low temperature annealing Ga(1-x)Mn(x)As, which is known to reduce Mn_I concentration. The reciprocal space maps measured all investigated...
Nanocrystalline samples of ZnO doped with Fe2O3 were synthetized by wet chemical method.The series nanosized in the wide range concentration (from 5 wt.% to 95 wt.%) was prepared precipitation from nitrate solutions using ammonia.The phase composition determined X-ray diffraction measurements.The phases hexagonal ZnO, and/or rhombohedric Fe2O3, ZnFe2O4 identified.The mean crystalline size nanocrystals, use Scherrer's formula, varied 8 52 nm.The preliminary micro-Raman spectroscopy...
Abstract In this paper we report on the crystal growth and magnetic as well structural studies of SiC:Fe. SiC crystals were grown by Physical Vapor Transport method. We used Fe enriched source material to dope crystals. The properties examined AC/DC magnetometry. AC susceptibility DC magnetization measurements revealed ferromagnetic type ordering. using powder X‐ray diffraction performed. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
On Raman scattering spectra of nanocrystaline samples ZnO(Co) prepared by use the microwave assisted hydrothermal synthesis, surface optical phonons (SOP) where observed in range 519 - 572 cm-1. The mean crystalline size (33 300 nm) as well phase composition obtained (ZnO, ZnCo2O4) determinate with X ray diffraction measurements. These measurements aloud us to study change SOP modes position and how concentration doping element CoO influence intensity.
Currently, wide-gap ZnO nanoparticles bear important potential application in electro-optical devices, transparent ultraviolet protection films, and spintronic devices. We have studied the magnetic properties of nanocrystals ZnO(Fe, Co, Mn) prepared by two methods synthesis. used microwave assisted hydrothermal synthesis traditional wet chemistry method followed calcination. The detailed structural characterization was performed means X-ray diffraction micro-Raman spectroscopy measurements....
Abstract The phase changes of MnO nanoparticles under laser‐induced heating have been studied. Previous confirmation the existence was based on X‐ray diffraction measurements. Here, we report experimental spectra nonresonant Raman scattering in range between 100 and 1,600 cm −1 , for a sample irradiated with 8 different laser powers. has produced change existing phases sample, destruction phase, creation 2 Mn 3 O 4 MnOOH along formation 2+ surface. These confirmed by atomic force microscopy
In this work we have studied the structural and magnetic properties of "as-prepared" multiwalled carbon nanotubes, synthesized by chemical vapor deposition method, chemically modified nanotubes.Transmission electron microscopy was used to show nanotubes structure.The results systematic property measurements on are presented.The static dynamic responses, such as temperature dependence linear AC susceptibility DC magnetization up 9 T were studied.We observed significant changes in for samples.
In some IV-VI semimagnetic semiconductors, the RKKY interaction can dominate over standard d-d superexchange and become driving mechanism for ion-ion coupling. effect, low hole concentrations Mn ion system is in a paramagnetic phase, whereas higher ones it reveals typical ferromagnetic behavior. this paper, recent work on (SnMnTe, PbSnMnTe GeMnTe) systems will be presented. particular, influence of presence two types magnetic ions (transition metal: rare earth Eu or Er) incorporated into...
Abstract The systematic magnetic and structural properties of as‐prepared, “Fe” catalyst based multiwalled carbon nanotubes (MWCNTs), chemically modified MWCNTs were studied. characterization by means transmission electron microscopy, X‐ray diffraction, Raman spectroscopy was performed. DC magnetization up to 9 T We examined the influence chemical treatment (purification procedure) on MWCNT's. significant changes in saturation after observed. However, we noticed high coercivity values for...
Abstract We present the studies of structural and magnetic properties graphene composites prepared with several quantities α -Fe 2 O 3 dopant 5%, 25% 50% made either ethanol or acetone. Our showed presence a weak order up to room temperature saturation magnetization close 0.2 emu g −1 in pure commercial graphene. With regard our + iron oxide samples, solvent used during preparation composite had significant influence on them. For Fe samples acetone played major role overall susceptibility...