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Akademický článek
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A nanostructured trigonal SnSe2 was produced by mechanical alloying, and the effect of high-pressures up to 25.8 GPa on it was investigated. The literature reports refined structural data for SnS2 for pressures up to 20 GPa. These data were used as i
Externí odkaz:
http://arxiv.org/abs/1803.05430
An approach combining the Rietveld method and pairs distribution function analysis to study crystalline materials under high pressure or temperature was early proposed by us, and in this study, it was applied to investigate de effect of high pressure
Externí odkaz:
http://arxiv.org/abs/1803.02479
An approach combining the Rietveld method and pairs distribution function analysis was developed and can help to understand the effect of temperature and/or high-pressure on crystalline materials. It was applied to orthorhombic Ta2O5 compound, and th
Externí odkaz:
http://arxiv.org/abs/1802.04648
Autor:
Donadel, K., Laranjeira, M. C. M., Gonçalves, V. L., Fávere, V. T., Machado, K. D., de Lima, J. C., Prates, L. H. M.
Hydroxyapatite samples were produced by two different wet-chemical methods, and characterized by x-ray diffraction, infrared and compression strength measurements. The x-ray diffraction measurements were simulated using the Rietveld method, and struc
Externí odkaz:
http://arxiv.org/abs/physics/0402002
Autor:
Machado, K. D., da Silva, R. C., de Lima, J. C., Grandi, T. A., Gasperini, A. A. M., Campos, C. E. M.
Three amorphous Co$_x$Nb$_{100-x}$ alloys, Co$_{25}$Nb$_{75}$, Co$_{57}$Nb$_{43}$ and Co$_{80}$Nb$_{20}$, were produced by Mechanical Alloying starting from the elemental powders. Their magnetic properties were determined using an alternating gradien
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402014
The short and intermediate range order of an amorphous GeSe$_4$ alloy produced by Mechanical Alloying were studied by Reverse Monte Carlo simulations of its x-ray total structure factor and Raman scattering. The simulations were used to compute the $
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402015
We have investigated the local atomic structure of amorphous TM-Ti alloys (TM = Co, Ni, Cu) produced by Mechanical Alloying by means of EXAFS analyses on TM and Ti K-edges. Coordination numbers and interatomic distances for the four alloys where foun
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402013
Autor:
Machado, K. D., de Lima, J. C., Grandi, T. A., Gasperini, A. A. M., Maurmann, C. E., Souza, S. M., Campos, C. E. M., Pimenta, A. F.
The crystalline structures of superionic high temperature copper selenides Cu$_{2-x}$Se ($0 \le x \le 0.25$) produced by Mechanical Alloying were investigated using X-ray diffraction (XRD) technique. The measured XRD patterns showed the presence of t
Externí odkaz:
http://arxiv.org/abs/cond-mat/0402012