Submicroscopic Structure Determination by Long Wavelength X‐Ray Diffraction

AbstractWe have investigated the magnetic order, using SQUID magnetometry, for short modulation wavelength Fe3O4/NiO superlattices, grown on single crystal MgO. Ferrimagnetic Fe3O4 has a saturation moment of ~500 emu/cm3 at 0 K and a Curie temperature of 858 K, while bulk NiO is antiferromagnetic with a NMel temperature of 525 K. Very high crystalline quality with little interdiffusion is indicated by X-ray diffraction, SEM, optical microscopy, and in-situ RHEED, and the samples show highly anisotropic electrical conductivity which also indicates the strong modulation present. Long wavelength samples (Amod > 200 Å) have a behavior only slightly different from that expected from bulk Fe3O4, but for Amod<80 Å, spontaneous magnetization is replaced by paramagnetism, with weak temperature dependence (not I/T) from 5 K to 400 K.

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Structure determination of modulated structures by powder X-ray diffraction and electron diffraction

Inorganic Chemistry Frontiers ◽

10.1039/c6qi00219f ◽

2016 ◽

Vol 3 (11) ◽

pp. 1351-1362 ◽

Cited By ~ 5

Author(s):

Zhengyang Zhou ◽

Lukáš Palatinus ◽

Junliang Sun

Keyword(s):

Electron Diffraction ◽

Structure Determination ◽

X Ray Diffraction ◽

X Ray ◽

Modulated Structures ◽

Conventional Methods

The combination of PXRD and ED is applied to determine modulated structures which resist solution by more conventional methods.

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A Case Study in Direct-Space Structure Determination from Powder X-ray Diffraction Data: Finding the Hydrate Structure of an Organic Molecule with Significant Conformational Flexibility†

Crystal Growth & Design ◽

10.1021/cg050212d ◽

2005 ◽

Vol 5 (6) ◽

pp. 2084-2090 ◽

Cited By ~ 13

Author(s):

Zhigang Pan ◽

Eugene Y. Cheung ◽

Kenneth D. M. Harris ◽

Edwin C. Constable ◽

Catherine E. Housecroft

Keyword(s):

Diffraction Data ◽

Structure Determination ◽

Organic Molecule ◽

Conformational Flexibility ◽

Space Structure ◽

X Ray Diffraction ◽

X Ray

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Retraction Notice: Ab initio structure determination and morphology study of La1.26 Zr0.25 Na2.5 N0.24 O2.54 triclinic structure from powder x-ray diffraction data

World Journal of Advanced Research and Reviews ◽

10.30574/wjarr.2021.10.3.0259 ◽

2021 ◽

Vol 10 (3) ◽

pp. 147-147

Author(s):

Bimal K Kanth ◽

Parashuram Mishra

Keyword(s):

Ab Initio ◽

Diffraction Data ◽

Structure Determination ◽

X Ray Diffraction ◽

X Ray ◽

Morphology Study ◽

Ab Initio Structure ◽

Triclinic Structure ◽

Retraction Notice

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New photochromic salt spiropyrans of indoline series

Доклады Академии наук ◽

10.31857/s0869-56524846698-702 ◽

2019 ◽

Vol 484 (6) ◽

pp. 698-702

Author(s):

A. D. Pugachev ◽

M. B. Lukyanova ◽

V. V. Tkachev ◽

B. S. Lukyanov ◽

N. I. Makarova ◽

...

Keyword(s):

Absorption Band ◽

Diffraction Analysis ◽

Hypsochromic Shift ◽

X Ray Diffraction ◽

Photochromic Properties ◽

Photoinduced Form ◽

X Ray ◽

Long Wavelength

The synthesis and study of the structure and photochromic properties of the new salt spiropyrans of the indoline series containing chlorine and bromine atoms as a substituent at the 6' position in 2H-chromene moiety are presented. The structure of the obtained compounds was confirmed by NMR 1H spectroscopy and X-ray diffraction analysis. The compounds are photochromic; the long-wavelength maximum of the absorption band of their open photoinduced form has a significant hypsochromic shift, and the lifetime substantially increases in comparison with the fluorine analog.

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