نتایج جستجو برای: xrd measurements

تعداد نتایج: 391005  

اشراقی, مهین , سلامتی, هادی, عبدالحسینی سارسری, اسماعیل , کاملی, پرویز ,

 In this paper, two La0/8sr0/2mno3 samples, isotropic (press without magnetic field) and anisotropic (press with magnetic field) have been prepared. Then we have investigated structural, magnetic and magnetotransport properties of these samples using XRD, SEM, Ac susceptibility and magnetoresistance measurements. These studies show that a magnetic property of anisotropic sample is improved and ...

زرگر شوشتری, مرتضی, موسوی قهفرخی, سید ابراهیم, حسینی, شهاب ,

In this research, M- type strontium hexaferrite nanoparticles (SrFe12O19) were synthesized via combustion sol–gel technique. To determine the optimum annealing temperature, thermogravimetry-differential thermal analysis (DTA/TG) was used.  Based on the results obtained from this analysis, the powders strontium hexaferrite were annealed between temperatures 750 and 1050°C. The structural and mor...

Single phase Eu doped GdMnO3 ceramics were prepared using solid state reaction route. Several different characterization techniques were used to investigate the structural and magnetic properties of the samples, including X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDX) and Vibrating Sample Magnetometer (VSM). All samples indicated single p...

2001
H. Takagi K. Maruyama N. Yoshizawa Y. Yamada Y. Sato

X-ray diffraction (XRD) analysis is a fundamental method to evaluate the carbon stacking structure in coal and carbon materials. However, the vagueness of XRD pattern of coal, which has the low crystallinity, often makes it difficult to evaluate the stacking structure quantitatively. In a previous study [1,2], we reported the standard analysis of carbon stacking structure in coal by XRD techniq...

Journal: :Journal of Crystal Growth 2023

A new method for the single crystal growth of rare-earth monopnictide DySb by self-flux technique is reported. Detailed structural, transport and magnetic characterisation has been carried out using X-ray diffraction (XRD), High resolution (HRXRD), resistivity magnetisation measurements, respectively. The Rietveld refinement powder XRD pattern reveals that grown in phase crystallises space grou...

2011
Ning Jia Shu-Ming Li Ming-Guo Ma Jie-Fang Zhu Run-Cang Sun

Cellulose-silica composite fiber samples have been successfully synthesized using cellulose solution, tetraethoxysilane, and NH3•H2O in ethanol/water mixed solvents at room temperature for 24 h. The cellulose solution was previously prepared by the dissolution of microcrystalline cellulose in a solvent mixture of N,N-dimethylacetamide (DMAc)/lithium chloride (LiCl). The effect of the tetraethox...

2004
R. J. Merriman

High-resolution transmission electron microscopy (HRTEM) measurements of the thickness of white mica crystallites were made on three pelite samples that represented a prograde transition from diagenetic mudstone though anchizonal slate to epizonal slate. Crystallite thickness, measured normal to (001), increases as grade increases, whereas the XRD measured 10 ~ peakprofile, the Kubler index, de...

1999
A. Eisenbach D. Pavlidis A. Philippe C. Bru-Chevallier C. Dubois

Properties of metalorganic vapor phase epitaxy (MOVPE) grown GaN bulk layers with varying GaN buffer growth conditions are characterized by low-temperature (6K) photoluminescence (LT-PL) and Xray diffraction (XRD). Full width at half-maximum (FWHM) of the near-bandedge emission of undoped layers is between 4.9 and 10meV, exhibiting no distinct dependence on buffer growth conditions. PL as well ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه هنر اصفهان - دانشکده حفاظت، مرمت اشیاء و ابنیه تاریخی 1388

کاوش های باستان شناسی اخیر در محوطه های پیش از تاریخِ جیرفت با بسیاری آثار و یادمان ها فرصت مناسبی برای پژوهش و بررسی دوباره را در ناحیه جنوب شرق ایران بعد از 3 دهه فراهم نمود. از جمله مهم-ترین آثار این تمدن سنگ های نرم و کنده کاری شده هستند. که به واسطه نقوش نمادین شان توجه بسیاری از متخصصین را به خود جلب کرده اند. نامشخص بودن منابع، عدم شناخت ماهیت فیزیکی و شیمیایی ساختار آنها اساس این تحقیق ...

Journal: :Acta Crystallographica Section A Foundations and Advances 2017

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