نتایج جستجو برای: saturation magnetization
تعداد نتایج: 64601 فیلتر نتایج به سال:
Epitaxial copper ferrite thin films were deposited on MgO substrates by the alternating target laser ablation deposition method. A series of films was studied to explore the impact of oxygen operating pressure, substrate temperature, and the ratio of laser shots incident on each target upon the magnetic, structural, and atomic structural properties. The highest saturation magnetization, 2800 G,...
The present study focuses on investigating the magnetic properties and the critical particle size for developing sizable spontaneous magnetic moment of bare Au nanoparticles. Seven sets of bare Au nanoparticle assemblies, with diameters from 3.5 to 17.5 nm, were fabricated with the gas condensation method. Line profiles of the X-ray diffraction peaks were used to determine the mean particle dia...
Cs2CuBr4 and Ba3NiSb2O9 are magnetically described as quasi-two-dimensional triangular-lattice antiferromagnets with spin1 2 and 1, respectively. We show that both systems exhibit a magnetization plateau at one-third of the saturation magnetization Ms due to the interplay of spin frustration and quantum fluctuation. In Cs2CuBr4 that has a spatially anisotropic triangular lattice, successive mag...
In this paper we focus on the contrast problem in medical imaging. It consists of using a single magnetic field to control a pair of non-interacting spins, each representing a specific substance, with the goal of maximizing the difference of the moduli of the magnetization vectors of the two substances. Prior work analyzed the saturation contrast problem which brings one of the spins to magneti...
Because of the biological compatibility, light weight and low cost, the possibility of having a room temperature carbon-based metal-ion free magnet attracts currently the interest of the scientific community. The search for magnetic ordering in carbon-based materials started, however, more than 15 years ago as Makarova [1] recently reviewed in detail. First claims on the existence of carbon-bas...
The field induced magnetic phase transitions of Cs2CuBr4 were investigated by means of magnetization process and neutron scattering experiments. This system undergoes magnetic phase transition at Neél temperature TN = 1.4K at zero field, and exhibits the magnetization plateau at approximately one third of the saturation magnetization for the field directions H ‖ b and H ‖ c. In the present stud...
nanotechnology is a general term which is related with field of all advanced science term that generally predicates with all modern technologies which consider nanoscales. improvement in the quality of products by adding some nanoparticles and study of their behavior in the presence of these nanoparticles have been obtained in many researches. on the other hand numerous demands for sowing ...
The nano-crystalline nickel-zinc ferrite was prepared via chemical synthesis. Zinc nitrate, nickel nitrate, iron nitrate hydrate, citric acid and ethylene glycol were used as precursor materials. Crystallization behavior of the precursor was studied by X-ray diffraction (XRD). Nanoparticle phases can change amorphous to spinel ferrite depending on the calcination temperature and crystallite siz...
A comparative study of magnetic properties of MnFe2O4 ferrite nanoparticles prepared by two different methods has been reported. The first sample (S1) was synthesized by thermal decomposition of metal nitrates. And the second sample (S2) was prepared by solvothermal method using Tri-ethylene glycol (TEG). Magnetic hysteresis loops at 300 and 5 K; magnetization and AC susceptibility measurements...
1. Abstract 2. Introduction 3. Relaxation methods 4. Diffusion methods 5. Methods involving magnetization transfer 5.1. Transferred NOE (Tr-NOE) 5.2. Saturation transfer difference and saturation transfer double difference 5.3. NOE pumping 5.4. WaterLOGSY and SALMON 5.5. INPHARMA 5.6. SAR by ILOEs 6. Experiments using fluorinated reporter molecules (FABS, FAXS) 7. Conclusions 8. Acknowledgement...
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