Direct Observation of Tetragonal Distortion in Epitaxial Structures through Secondary Peak Split in a Synchrotron Radiation Renninger Scan

2010 ◽  
Vol 10 (8) ◽  
pp. 3436-3441 ◽  
Author(s):  
Alan S. de Menezes ◽  
Adenilson O. dos Santos ◽  
Juliana M. A. Almeida ◽  
José R. R. Bortoleto ◽  
Mônica A. Cotta ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Direct Observation ◽  
Tetragonal Distortion ◽  
Secondary Peak ◽  
Peak Split

Direct Observation of Monolayer Zones in Al-wt 4% Cu

1990 ◽  
Vol 48 (1) ◽  
pp. 14-15
Author(s):  
B. Jouffrey ◽  
D. Dorignac ◽  
A. Bourret
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Direct Observation ◽  
Supersaturated Solid Solution ◽  
Original Model ◽  
X Ray ◽  
Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

Direct Observation of X-ray Induced Atomic Motion Using Scanning Tunneling Microscope Combined with Synchrotron Radiation

2011 ◽  
Vol 11 (4) ◽  
pp. 2873-2881 ◽  
Author(s):  
Akira Saito ◽  
Takehiro Tanaka ◽  
Yasumasa Takagi ◽  
Hiromasa Hosokawa ◽  
Hiroshi Notsu ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Direct Observation ◽  
Scanning Tunneling Microscope ◽  
Atomic Motion ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
X Ray

Interfacial Superstructures Studied by Grazing Incidence X-Ray Diffraction

1989 ◽  
Vol 159 ◽  
Author(s):  
Koichi Akimoto ◽  
Jun'Ichiro Mizuki ◽  
Ichiro Hirosawa ◽  
Junji Matsui
Keyword(s):  
Synchrotron Radiation ◽  
Direct Observation ◽  
Molecular Beam ◽  
Solid Phase ◽  
Grazing Incidence ◽  
Deposition Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Beam Deposition ◽  
Beam Deposition

ABSTRACTSurface superstructures (reconstructed structures) have been observed by many authors. However, it is not easy to confirm that a superstructure does exist at an interface between two solid layers. The present paper reports a direct observation, by a grazing incidence x-ray diffraction technique with use of synchrotron radiation, of superstructures at the interface. Firstly, the boron-induced R30° reconstruction at the Si interface has been investigated. At the a Si/Si(111) interface, boron atoms at 1/3 ML are substituted for silicon atoms, thus forming a R30° lattice. Even at the interface between a solid phase epitaxial Si(111) layer and a Si(111) substrate, the boron-induced R30° reconstruction has been also observed. Secondly, SiO2/Si(100)-2×l interfacial superstructures have been investigated. Interfacial superstructures have been only observed in the samples of which SiO2 layers have been deposited with a molecular beam deposition method. Finally, the interfaces of MOCVD-grown AIN/GaAs(100) have been shown to have 1×4 and 1×6 superstructures.

scholarly journals Direct Observation of para-Xylylene as the Decomposition Product of the meta-Xylyl Radical Using VUV Synchrotron Radiation

2013 ◽  
Vol 4 (15) ◽  
pp. 2546-2550 ◽  
Author(s):  
Patrick Hemberger ◽  
Adam J. Trevitt ◽  
Edward Ross ◽  
Gabriel da Silva
Keyword(s):  
Synchrotron Radiation ◽  
Direct Observation ◽  
Decomposition Product

Direct Observation of Diffraction Arcs from Nanoscale Precipitates in Steels by Highly Brilliant and Focused Synchrotron Radiation Beam and Imaging Plate

1994 ◽  
Vol 332 ◽  
Author(s):  
Yasuo Takagi ◽  
Yoshitaka Okitsu ◽  
Toshiyasu Ukena
Keyword(s):  
Synchrotron Radiation ◽  
Direct Observation ◽  
Dynamic Range ◽  
High Sensitivity ◽  
Imaging Plate ◽  
Synchrotron Radiation Beam ◽  
Radiation Beam ◽  
X Ray ◽  
The Matrix ◽  
First Time

ABSTRACTDirect observation of diffraction arcs by X-ray from nanoscale precipitates in steels has become possible for the first time by using a highly brilliant and focused synchrotron radiation beam at BL3A of Photon Factory, and also by using an “imaging plate”, a two dimensional X-ray detector which has a wide dynamic range and high sensitivity. For examples, most of the diffraction arcs from ε-Cu precipitates (∼200 Å in diameter and ∼1 at. % in concentration) in Cu-added steels were observed. The method can apply to nondestructive and in-situ observation of creation and growth processes of the precipitates which has close relationships to various physical properties of the matrix steels.

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