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
Keyword(s):  
Twin Boundary ◽  
Phase Nucleus ◽  
New Phase

INFLUENCE OF AN EXTERNAL MAGNETIC FIELD ON THE DYNAMICS OF A NEW-PHASE NUCLEUS IN THE VICINITY OF THE FIRST-ORDER PHASE TRANSITION IN MAGNETS WITH DEFECTS PRESENT

2012 ◽  
Vol 26 (28) ◽  
pp. 1250183 ◽  
Author(s):  
VLADIMIR NAZAROV ◽  
RISHAT SHAFEEV
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
External Magnetic Field ◽  
Magnetic Anisotropy ◽  
Spin Reorientation ◽  
Critical Fields ◽  
First Order ◽  
Phase Nucleus ◽  
First Order Phase Transition ◽  
New Phase

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.

Kinetics of the New Phase Nucleus Growth on a Magnet near the Curie Point

1990 ◽  
Vol 117 (1) ◽  
pp. 61-65
Author(s):  
Yu. Devyatko ◽  
V. N. Tronin ◽  
V. I. Troyan
Keyword(s):  
Curie Point ◽  
Phase Nucleus ◽  
Nucleus Growth ◽  
Kinetics Of ◽  
New Phase

Kinetics of the New Phase Nucleus Growth on a Magnet near the Curie Point

1990 ◽  
pp. 61-66
Author(s):  
Yu. Devyatko ◽  
V. N. Tronin ◽  
V. I. Troyan
Keyword(s):  
Curie Point ◽  
Phase Nucleus ◽  
Nucleus Growth ◽  
Kinetics Of ◽  
New Phase

Electron microscopy of niobium and tantalum hydrides

1978 ◽  
Vol 36 (1) ◽  
pp. 644-645
Author(s):  
T. Schober
Keyword(s):  
Electron Microscopy ◽  
Heat Storage ◽  
Measurement Techniques ◽  
Metal Hydrides ◽  
Detailed Understanding ◽  
Storage Devices ◽  
Unit Cells ◽  
Endothermic Reactions ◽  
Hydrogen Reactions ◽  
New Phase

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 %.

Twin boundary structure of a Y-Ba-Cu-O superconductor

1989 ◽  
Vol 47 ◽  
pp. 168-169
Author(s):  
Yimei Zhu ◽  
Masaki Suenaga ◽  
R. L. Sabatini ◽  
Youwen Xu
Keyword(s):  
Twin Boundary ◽  
Fine Particles ◽  
Imaging Techniques ◽  
Fine Powder ◽  
Orthorhombic Phase ◽  
Boundary Structure ◽  
Crystallographic Axis ◽  
System A ◽  
High Resolution Structure ◽  
Electron Microscopes

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.

Twin Boundary in Bechgaard Salt: Structure and Unusual Dynamics

1996 ◽  
Vol 6 (12) ◽  
pp. 1567-1574 ◽  
Author(s):  
M. Mukoujima ◽  
K. Kawabata ◽  
T. Sambongi
Keyword(s):  
Twin Boundary ◽  
Salt Structure ◽  
Bechgaard Salt

Motion of twin boundary in (TMTSF)2X. Comparison with DW dynamics

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

Bangladesh in 1986: Entering a New Phase

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

Phenomenon of reading: temporal and praxeological asects

2018 ◽  
pp. 16-23
Author(s):  
S. V. Shevtsov
Keyword(s):  
Primary Memory ◽  
Close Reading ◽  
Human Being ◽  
Reading Text ◽  
New Phase

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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