Growth temperature dependence of biquadratic coupling in Fe/Cr(100) superlattices studied by polarized neutron reflectivity and x‐ray diffraction (abstract)

1994 ◽  
Vol 75 (10) ◽  
pp. 6193-6193 ◽  
Author(s):  
M. Schäfer ◽  
J. A. Wolf ◽  
P. Grünberg ◽  
J. F. Ankner ◽  
A. Schreyer ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Growth Temperature ◽  
Neutron Reflectivity ◽  
X Ray Diffraction ◽  
X Ray ◽  
Polarized Neutron ◽  
Growth Temperature Dependence

scholarly journals Measurements by x-ray diffraction of the temperature dependence of lattice parameter and crystallite size for isostatically-pressed graphite

Carbon Trends ◽  
2021 ◽  
pp. 100071
Author(s):  
Keith R. Hallam ◽  
James Edward Darnbrough ◽  
Charilaos Paraskevoulakos ◽  
Peter J. Heard ◽  
T. James Marrow ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Crystallite Size ◽  
Lattice Parameter ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Growth Temperature Dependence of Eu-Doped GaN Grown by Organometallic Vapor Phase Epitaxy

2010 ◽  
Vol 59 (9) ◽  
pp. 671-674
Author(s):  
Atsushi NISHIKAWA ◽  
Takashi KAWASAKI ◽  
Naoki FURUKAWA ◽  
Yoshikazu TERAI ◽  
Yasufumi FUJIWARA
Keyword(s):  
Temperature Dependence ◽  
Vapor Phase ◽  
Growth Temperature ◽  
Vapor Phase Epitaxy ◽  
Organometallic Vapor Phase Epitaxy ◽  
Growth Temperature Dependence

scholarly journals Growth temperature dependence of optical modal gain and loss in GaN:Eu active medium on Si

2006 ◽  
Vol 14 (12) ◽  
pp. 5307 ◽  
Author(s):  
J. H. Park ◽  
A. J. Steckl ◽  
P. Rajagopal ◽  
J. C. Roberts ◽  
E. Piner
Keyword(s):  
Temperature Dependence ◽  
Active Medium ◽  
Growth Temperature ◽  
Modal Gain ◽  
Gain And Loss ◽  
Growth Temperature Dependence

Molecular Motion and Conformational Interconversion of Azobenzenes in Crystals as Studied by X-ray Diffraction

1997 ◽  
Vol 53 (4) ◽  
pp. 662-672 ◽  
Author(s):  
J. Harada ◽  
K. Ogawa ◽  
S. Tomoda
Keyword(s):  
Temperature Dependence ◽  
Crystal Structures ◽  
Torsional Vibration ◽  
Molecular Motion ◽  
X Ray Diffraction ◽  
Dynamic Disorder ◽  
X Ray ◽  
Conformational Interconversion ◽  
Free Molecules

Crystal structures of (E)-azobenzene (1), (E)-2,2′- dimethylazobenzene (2), (E)-3,3′-dimethylazobenzene (3) and (E)-4,4′-dimethylazobenzene (4) were determined by X-ray diffraction at various temperatures. An apparent shrinkage of the N=N bond and its temperature dependence were observed and are interpreted in terms of an artifact caused by the torsional vibration of the N—Ph bonds in crystals. In the crystal structures of (1), (3) and (4) the dynamic disorder was observed. The disorder is accounted for by the torsional vibration whose amplitude is large enough to give rise to the conformational interconversion. No disorder was observed for a crystal of (2). This is ascribed to the large difference in energy of the two conformers as free molecules. The true length of the N=N bond in azobenzenes was estimated to be 1.26–1.27 Å.

scholarly journals Electrical, structural, and photocatalytic properties of copper oxide nanowire

2020 ◽  
Vol 44 (7-8) ◽  
pp. 471-474
Author(s):  
Azadeh Jafari ◽  
SAA Terohid ◽  
Alireza Kokabi ◽  
Amir Moradiani
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Copper Oxide ◽  
Growth Temperature ◽  
Photocatalytic Properties ◽  
X Ray Diffraction ◽  
Direct Oxidation ◽  
Oxide Nanowires ◽  
X Ray ◽  
Scanning Electron

Using a direct oxidation method in a horizontal quartz tube, copper oxide nanowires are grown on a Cu substrate. In order to investigate the growth temperature effects on the structural, morphological, electrical, and photocatalytic properties of the copper oxide nanowires, X-ray diffraction, scanning electron microscopy, a KEITHLEY 2361 system, and a homemade photoreactor are used. The X-ray diffraction results show that both CuO and Cu2O phases are formed, and while increasing the growth temperature, the crystallinity is improved and the intensity of most of the diffraction peaks increases. The scanning electron microscopy images at different growth temperatures show that the number, density, and length of the copper oxide nanowires on pre-formed micro-scaled grains increase, when the growth temperature increases to 700°C and sharper nanowires with average diameters of 1–3 µm grow on the surface. Also I–V curves show that by raising the growth temperature, the conductivity of the samples increases. In addition, the photocatalytic activities are studied by photocatalytic degradation of Congo red dye, and based on these results, the sample grown at 700°C with the highest number and density of the nanowires showed the best photocatalytic performance and electrical conductivity. The results can be used to guide better understanding of the growth behavior of copper oxide nanowires and can be useful for the development of novel photocatalytic nanodevices.

Polymorphic transformations and thermal expansion of some modifications in Ag1.5Cu0.5Se and Ag0.4Cu1.6Se

2019 ◽  
Vol 33 (23) ◽  
pp. 1950271 ◽  
Author(s):  
Y. I. Aliyev ◽  
Y. G. Asadov ◽  
A. O. Dashdemirov ◽  
R. D. Aliyeva ◽  
T. G. Naghiyev ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
High Temperature ◽  
Temperature Dependence ◽  
Single Crystals ◽  
Diffraction Method ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Polymorphic Transformations ◽  
X Ray

The Ag[Formula: see text]Cu[Formula: see text]Se and Ag[Formula: see text]Cu[Formula: see text]Se compounds have been synthesized and grown as single crystals. High-temperature X-ray diffraction method was used to study polymorphic transformations. It is shown that the Ag[Formula: see text]Cu[Formula: see text]Se crystals of high-temperature FCC modification are decomposed into Ag2Se and AgCuSe when the temperature decreases below T = 488 K and Ag[Formula: see text]Cu[Formula: see text]Se is decomposed into Cu2Se and AgCuSe when the temperature decreases below T = 540 K. Transformations in both compounds are reversible. Crystalline parameters are obtained and the temperature dependence of the lattice parameters for each phase is built.

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