New phase nucleus appearance on a twin boundary, which is with an invaribe velocity or oscillating

1993 ◽  
Vol 3 (5) ◽  
pp. 1175-1186 ◽  
Author(s):  
A. A. Bulbich ◽  
P. E. Pumpyan
2012 ◽  
Vol 26 (28) ◽  
pp. 1250183 ◽  
Author(s):  
VLADIMIR NAZAROV ◽  
RISHAT SHAFEEV

Theoretically, with the aid of a soliton model, the evolution of a new-phase nucleus near the first-order spin-reorientation phase transition in magnets has been investigated in an external magnetic field. The influence of an external field and one-dimensional defects of magnetic anisotropy on the dynamics of such nucleus has been demonstrated. The conditions for the localization of the new-phase nucleus in the region of the magnetic anisotropy defect and for its escape from the defect have been determined. The values of the critical fields which bring about the sample magnetization reversal have been identified and estimated.


1990 ◽  
Vol 117 (1) ◽  
pp. 61-65
Author(s):  
Yu. Devyatko ◽  
V. N. Tronin ◽  
V. I. Troyan

1990 ◽  
pp. 61-66
Author(s):  
Yu. Devyatko ◽  
V. N. Tronin ◽  
V. I. Troyan

Author(s):  
T. Schober

Nb, Ta and V are prototype substances for the study of the endothermic reactions of H with metals. Such metal-hydrogen reactions have gained increased importance due to the application of metal-hydrides in hydrogen- und heat storage devices. Electron microscopy and diffraction were demonstrated to be excellent methods in the study of hydride morphologies and structures (1). - Figures 1 and 2 show the NbH and TaH phase diagrams (2,3,4). EM techniques have contributed substantially to the elucidation of the structures and domain configurations of phases β, ζ and ε (1,4). Precision length measurement techniques of distances in reciprocal space (5) recently led to a detailed understanding of the distortions of the unit cells of phases ζ and ε (4). In the same work (4) the existence of the new phase η was shown. It is stable near -68 °C. The sequence of transitions is thus below 70 %.


Author(s):  
Yimei Zhu ◽  
Masaki Suenaga ◽  
R. L. Sabatini ◽  
Youwen Xu

The (110) twin structure of YBa2Cu3O7 superconductor oxide, which is formed to reduce the strain energy of the tetragonal to orthorhombic phase transformation by alternating the a-b crystallographic axis across the boundary, was extensively investigated. Up to now the structure of the twin boundary still remained unclear. In order to gain insight into the nature of the twin boundary in Y-Ba-Cu-O system, a study using electron diffraction techniques including optical and computed diffractograms, as well as high resolution structure imaging techniques with corresponding computer simulation and processing was initiated.Bulk samples of Y-Ba-Cu-O oxide were prepared as described elsewhere. TEM specimens were produced by crushing bulk samples into a fine powder, dispersing the powder in acetone, and suspending the fine particles on a holey carbon grid. The electron microscopy during this study was performed on both a JEOL 2000EX and 2000FX electron microscopes operated at 200 kV.


1996 ◽  
Vol 6 (12) ◽  
pp. 1567-1574 ◽  
Author(s):  
M. Mukoujima ◽  
K. Kawabata ◽  
T. Sambongi

1999 ◽  
Vol 09 (PR10) ◽  
pp. Pr10-297-Pr10-298
Author(s):  
T. Sambongi ◽  
T. Yokoyama ◽  
T. Saga ◽  
K. Kawabata
Keyword(s):  

Asian Survey ◽  
1987 ◽  
Vol 27 (2) ◽  
pp. 163-172 ◽  
Author(s):  
Syed Serajul Islam
Keyword(s):  

Author(s):  
S. V. Shevtsov

The creative character of reading is revealed through the elucidation of its temporal constitutions and consideration of some practical aspects of this phenomenon. Reading isn’t intellectual, aesthetical procedure, but co-being between a text and a reader. Reading is one of the ways of becoming and forming in human being specific metaphysical organs. Thanks to them there are some actual conditions of freedom, love, faith, virtue, responsibility etc. Impression as point-wise part of time, orienting on presence and changing with every new phase of reading text is shown. Impression isn’t feeling, but invasion, that includes intensity, completeness of action. That’s why reading text should impress and invade in limits of being of a reader, catch them, hold them by its energy his attention. Retention as primary memory of read text and holding some information during its distancing from the point of impression is researched. Possibilities of using of some technics of reading – reading out loud of dialogues of Plato, reflexive reading, close reading etc.


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