Magnetic properties

ZnO nanostructures have been fabricated by annealing zinc acetate dihydrate at different temperatures (Tan). Thermogravimetric analysis, and XRD and Raman studies indicate ZnO crystals formed at above 250oC.

15p vimitsuki 30-03-2025 2 0   Download

The first principle calculation was employed to investigate the formation energies and structural, electronic, and magnetic properties of intrinsic and Ni-doped sodium bismuth titanate Bi0.5Na0.5TiO3(BNT). The obtained formation energies indicate that Ni atoms prefer to dope into Bi-sites in the lattice of BNT while the calculated band structure shows that the doping leads to the emergence of new midgap energy states in the bandgaps, reducing the bandgap value of doped materials.

10p viaburame 14-03-2025 3 1   Download

In this study, spinel ferrite nanoparticles CoFe2-xLaxO4 (x = 0, 0.025, and 0.05) were successfully synthesized via a simple co-precipitation method using a 5% NaOH solution as a precipitating agent. The physicochemical properties of the materials, annealed at 850 °C for one hour, were characterized using powder X-ray diffraction (PXRD), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and vibrating-sample magnetometry (VSM) at room temperature.

10p viling 11-10-2024 3 1   Download

This paper presents, we present the structure, magnetic properties, and magnetocaloric effect of the Fe81-xCrx+4B2Zr10Nd3 (x = 0, 1, 2, and 3) alloy ribbons. The alloy ribbons were prepared by using the meltspinning method. Structural analysis by X-ray diffraction shows that the obtained alloy ribbons are almost amorphous.

8p vibenya 31-12-2024 5 2   Download

The research objectives of the thesis: Mn-(Bi, Ga) based rare-earth-free hard magnetic materials. Soft magnetic materials of Fe-Co. Rare-earth-free hard magnetic nano composite materials of Mn-(Bi, Ga)/Fe-Co.

27p thebadguys 08-06-2021 35 5   Download

Research objectives of the thesis: Clarification influence of the elements Na, Sr and Ba substituting for La/Ca and crystal size on the magnetic properties, phase transition and magnetocaloric effects of La0,7Ca0,3MnO3 materials. Found the materials for significant mmagnetocaloric parameters have potential for applications in magnetic refrigeration.Determine the effect of replacing Sr/Ba for Ca in La0,7Ca0,3MnO3 and Co substituting for Mn in La0,7Sr0,3MnO3 on their critical behavior as well as the ferromagnetic interactions order.

31p extraenglish 24-05-2021 28 4   Download

This work aims to fabricate ferrite - (Ag, Au) hybrid nanomaterials with a SPR peak located in the near-infrared region, high magnetic/optical-to-thermal conversion and ability to contrast MRI images for both T1- and T2- weighted modes, which are strongly bactericidal and able to be applied in biomedicine.

30p capheviahe27 23-02-2021 24 3   Download

Find the optimal technology parameters and components for fabricating Fe-based nanomaterials using high-energy ball milling method; clarify the relationship between technological conditions with the structural characteristics and magnetic properties of fabricated materials; assess the applicability of Fe, Fe-Co nano materials in fabricating nanocomposite magnets and magnetic induction heating.

24p capheviahe26 25-01-2021 20 2   Download

Influence of substitution of 3d metals for Mn on properties of La0.67Ca0.33Mn0.9 TM0.1O3 (TM = Fe, Co, Ni) compounds was studied. Ferromagnetic – paramagnetic and metals – insulator transitions were significantly affected by Mn-site substitution. However, no observable difference was found in their crystal structure from X-ray diffraction analysis. At room temperature the structure characterization of these compounds gave the single phase and structure is the distortion orthorhombic cell with space group symmetry Pnma.

12p 12120609 01-06-2020 16 2   Download

The thesis aims to produce nanoparticles (dielectric, ferrites, ferromagnetic, metal) and their nanoparticles. Find the optimal technology process, suitable for making absorbent samples. Survey the basic properties of fabricated nanomaterials. Measuring and studying the effects of microwave absorption in magnetic-dielectric nanoparticles, absorption mechanisms and dependence of absorbing properties on the parameters of materials, thereby finding solutions Enhance absorption capacity as well as adjust absorption parameters.

28p xacxuoc4321 09-07-2019 30 4   Download

The objectives of the thesis: Manufacturing multifunctional nanoparticles including: Fe3O4 nanoparticles (magnetical properties) coated with biocompatible polymers, attaching drugs (Cur, Dox) and targeted folate factor (optical properties)) that are well dispersed in water, able to target the cancer.Experiment and evaluate the effect of the nanoparticles on cancer cell lines such as HT29; HeLa; HepG2 ... and on experimental animals.

27p xacxuoc4321 09-07-2019 68 5   Download

The goad of the thesis is to build the manufacture process of nano-sized magnetic fluids based on iron oxide (uniform particle size and high magnetic saturation) with stable technology; Characteristic research of magnetic properties of magnetic nanoparticles; assessment of toxicity and test of effects on cells, aiming to make contrast medicine in imaging diagnosis by magnetic resonance imaging (MRI), application on accurately identifying cancer.

28p xacxuoc4321 08-07-2019 47 5   Download

Purpose, object and scope of studying: Apply of q-deformed Fermi-Dirac statistics to research heat capacity and paramagnetic susceptibility of free electron gas in metals at low temperatures, formula of heat capacity and magnetic susceptibility from the free electron gas in a metal depends on q deformation

26p change00 04-05-2016 47 3   Download

The purified membrane-bound [NiFe]-hydrogenase from Methanosarcina barkeriwas studied with electron para-magnetic resonance (EPR) focusing on the properties of the iron–sulphur clusters. TheEPRspectra showed signals from threedifferent [4Fe)4S] clusters.Twoof the clusters couldbe reduced under 101 kPa of H2, whereas the third cluster was only partially reduced.

11p tumor12 22-04-2013 38 3   Download

The solutionmolecular andelectronic structuresof theactive site in the extremelyO2-avidhemoglobin fromthe trematode Paramphistomum epiclitumhave been investigated by 1 H NMR on the cyanomet form in order to elucidate the distal hydrogen-bonding to a ligated H-bond acceptor ligand. Comparison of the strengths of dipolar interactions in solution with the alternate crystal structures of methemo-globin establish that the solution structure of wild-type Hb more closely resembles the crystal structure of the recom-binant wild-type than the true wild-type met-hemoglobin....

14p fptmusic 16-04-2013 51 3   Download

The aim of the study was to investigate the crystallization kinetics and solidification behaviour of Fe60Co8Mo5Zr10W2B15 bulk glass forming alloy. The solidification behaviour in near-equilibrium and non-equilibrium cooling conditions was studied. The eutectic and peritectic reactions were found to exist in the solidification sequence of the alloy. The bulk metallic glass formation was achieved by using two methods: quenching from the liquid state and quenching from the semi-state.

140p dontetvui 21-01-2013 85 13   Download

About a decade ago, the elastic properties of a single chromatin fiber and, subsequently, those of a single nucleosome started to be explored using optical and magnetic tweezers. These techniques have allowed direct mea-surements of several essential physical parameters of individual nucleo-somes and nucleosomal arrays, including the forces responsible for the maintenance of the structure of both the chromatin fiber and the individual nucleosomes

13p cosis54 05-01-2013 37 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Initial susceptibility and viscosity properties of low concentration e-Fe3 N based magnetic fluid

6p dauphong18 09-03-2012 36 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis, structure and magnetic properties of b-MnO2 nanorods

6p dauphong18 09-03-2012 54 5   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Electronic and magnetic properties of SnO2/CrO2 thin superlattices

5p sting05 09-02-2012 60 5   Download