Results 31 to 40 of about 42,195 (291)

Crystallite Size Effect on Lattice Strain and Crystal Structure of Ba1/4Sr3/4MnO3 Layered Perovskite Manganite

, 2018
The single phase polycrystalline Ba1/4Sr3/4MnO3 layered perovskite manganite has been synthesized by combustion method having various crystallite sizes.
Kumar, Dinesh, Singh, Akhilesh Kumar, Singh, Monika   +2 more
core   +1 more source

On the role of intrinsic disorder in the structural phase transition of magnetoelectric EuTiO3 [PDF]

, 2011
Up to now the crystallographic structure of the magnetoelectric perovskite EuTiO3 was considered to remain cubic down to low temperature. Here we present high resolution synchrotron X-ray powder diffraction data showing the existence of a structural ...
Christos Panagopoulos, Claudio Mazzoli, Helen C. Walker, Leszek J. Spalek, Marco Scavini, Mattia Allieta, Siddharth S. Saxena, T. Egami, Takuro Katsufuji, Valerio Scagnoli   +9 more
core   +2 more sources

Global Rietveld refinement

Journal of Research of the National Institute of Standards and Technology, 2004
Global optimisation methods of structure determination from powder diffraction data have risen to prominence in a relatively short space of time and they now constitute a key approach in the examination of polycrystalline molecular organic materials. A correctly formulated global optimisation approach may be regarded as a "global Rietveld refinement ...
openaire   +2 more sources

X-ray Diffraction Analysis of Cu2+ Doped Zn1-xCuxFe2O4 Spinel Nanoparticles using Williamson-Hall Plot Method

, 2019
The nanoparticles (NPs) of Zn1-xCuxFe2O4 (ZCFO) spinels with x = 0, 0.2, 0.4, 0.6 and 0.8 were synthesized by a sol-gel combustion method using acetate precursor. The NPs of ZCFO were prepared by following calcination process at 600C for 8hrs.
Kumar, Abhishek, Kumar, Dinesh, Prakash, Rajiv, Singh, Akhilesh Kumar   +3 more
core   +1 more source

Investigation on the crystal structure and mechanical properties of the ternary compound Mg11-xZnxSr combined with experimental measurements and first-principles calculations

Journal of Magnesium and Alloys, 2023
A new ternary compound, Mg11-xZnxSr in the Mg-Zn-Sr system was observed and studied using Scanning Electron Microscopy (SEM), Energy-Dispersive Spectroscope (EDS), X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM).
Jian Wang, Lingzhong Meng, Zhang Zhang, Baisheng Sa, Xiaoxiao Fu, Liyuan Sheng, Daokui Xu, Yufeng Zheng   +7 more
doaj   +1 more source

Structural study of Cu$_{2-x}$Se alloys produced by mechanical alloying

, 2004
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.
A.A.M. Gasperini, Audebrand, Bhowmik, C.E. Maurmann, J.C. de Lima, K.D. Machado, Klug, Larchev, Li, Liu, Parkin, Qin, S. Michielon de Souza, Smith, Suryanarayana, T.A. Grandi, Takahashi, Tsay, Young, Zhou, Zhou   +20 more
core   +1 more source

Structure determination from powder data : Mogul and CASTEP [PDF]

, 2009
When solving the crystal structure of complex molecules from powder data, accurately locating the global minimum can be challenging, particularly where the number of internal degrees of freedom is large.
Bardin, J., Florence, A. J., Griffin, T. A. N., Johnston, B., Shankland, K., Shankland, N.   +5 more
core   +1 more source

Phase relations in K_xFe_{2-y}Se_2 and the structure of superconducting K_xFe_2Se_2 via high-resolution synchrotron diffraction

, 2012
Superconductivity in iron selenides has experienced a rapid growth, but not without major inconsistencies in the reported properties. For alkali-intercalated iron selenides, even the structure of the superconducting phase is a subject of debate, in part ...
A. Larson, Anna Llobet, Daniel P. Shoemaker, Duck Young Chung, Helmut Claus, J.-F. Bérar, Melanie C. Francisco, Mercouri G. Kanatzidis, Sevda Avci   +8 more
core   +1 more source

The Rietveld Refinement in the EXPO Software: A Powerful Tool at the End of the Elaborate Crystal Structure Solution Pathway

Crystals, 2018
The Rietveld method is the most reliable and powerful tool for refining crystal structure when powder diffraction data are available. It requires that the structure model to be adjusted is as close as possible to the true structure.
Angela Altomare, Francesco Capitelli, Nicola Corriero, Corrado Cuocci, Aurelia Falcicchio, Anna Moliterni, Rosanna Rizzi   +6 more
doaj   +1 more source

Evidence for existence of Functional Monoclinic Phase in Sodium Niobate based Solid Solution by Powder Neutron Diffraction

, 2018
We have carried out systematic temperature-dependent neutron diffraction measurements in conjunction with dielectric spectroscopy from 6 to 300 K for sodium niobate based compounds (1-x) NaNbO3 -xBaTiO3 (NNBTx).
Chaplot, S. L., Jauhari, Mrinal, Krishna, P. S. R., Mishra, S. K., Mittal, R., Reddy, V. R.   +5 more
core   +1 more source