Low temperature x-ray diffraction study of the phase transitions in Sr1-xCaxTiO3 (x=0.02,0.04): Evidence for ferrielectric ordering
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چکیده
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study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour
this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...
X-ray Diffraction and SEM Studies on the Effect of Temperature on the Formation of Main Phase Sr2MgSi2O7 Using a Wet and Dry Method for its Preparation
A pure Silicate host namely Sr2MgSi2O7 as a support for a long-lasting afterglow when dopped with rare-earth elements was sought after. To this end the process of obtaining firing temperatures of the above mentioned phase in normal condition was carried out using suggested wet and dry methods. The degree of purity obtained in these preparatory methods as wel...
متن کاملIn-plane X-ray diffraction from monolayers of perfluorinated fatty acids: evidence for azimuthal ordering in the condensed phase
We report the results of new grazing incidence X-ray diffraction studies of Langmuir monolayers of F(CF~)jjCOOH and F(CF~)jOCH~COOH supported on water in each case the locations and intensities of the first three diffraction peaks ((1, 0), (1, 1) and (2, 0)) have been measured. These new data are consistent with earlier ones in that both monolayers have simple hexagonal packing of molecules wit...
متن کاملPhase-targeted X-ray diffraction
A powder X-ray diffraction (XRD) method to enhance the signal of a specific crystalline phase within a mixture is presented for the first time. Specificity to the targeted phase relies on finding coincidences in the ratios of crystal d spacings and the ratios of elemental characteristic X-ray energies. Such coincidences can be exploited so that the two crystal planes diffract through the same s...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2009
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.3273863