Short Range Order of Spins in Cu(NO3)22.5H2O under Magnetic Field

1970 ◽  
Vol 29 (3) ◽  
pp. 663-666 ◽  
Author(s):  
Masashi Tachiki ◽  
Takemi Yamada ◽  
Sadamichi Maekawa
Keyword(s):  
Magnetic Field ◽  
Short Range ◽  
Short Range Order ◽  
Range Order

Influence of Magnetic Field on Formation of Short Range Order Regions in Liquid Metals: Fluctuation Hypothesis

2018 ◽  
Vol 777 ◽  
pp. 316-321 ◽  
Author(s):  
Mikhail Arkulis ◽  
Oxana Logunova ◽  
Denis Dolgushin
Keyword(s):  
Magnetic Field ◽  
Temperature Fluctuation ◽  
Short Range ◽  
Short Range Order ◽  
Liquid Metals ◽  
Range Order ◽  
Crystallization Time ◽  
Theoretical Justification ◽  
Manufacturing Operations ◽  
Analytical Expressions

The aim of this investigation is to provide theoretical justification of the crystallizing nucleus formation in liquid iron. To solve this problem, the authors put forward the fluctuation hypothesis: short range order region formation in liquid metal takes place due to temperature fluctuations, and the temperature of the short range order is the temperature fluctuation around Kelvin scale zero in the course of crystallization time. The investigations were carried out for liquid state of the substance, in particular, for iron in paramagnetic state at the melting temperature. Analytical derivation of the temperature fluctuation value was given. Analytical expressions were obtained to define the average number of atoms in the short range order region for crystallizing iron. The investigation results show that short range order contains enough atoms to provide interaction with pulsed magnetic field resulting in the increase in the number of crystallization nuclei and in the decrease of their size. The obtained results can be used in the decision-making process concerning some manufacturing operations aimed at providing homogeneous structure of metals, particularly, in ferrous and non-ferrous metallurgy.

Mathematical Modeling of the Magnetic Field Effect on Molten Iron Crystallization

2020 ◽  
Vol 861 ◽  
pp. 519-523
Author(s):  
Nataliy Arkulis ◽  
Mikhail Arkulis ◽  
Oxana S. Logunova ◽  
Yuri Savchenko ◽  
Denis Dolgushin
Keyword(s):  
Magnetic Field ◽  
Energy Function ◽  
Short Range ◽  
Short Range Order ◽  
Magnetic Field Effect ◽  
Molten Iron ◽  
Range Order ◽  
Melt Crystallization ◽  
Simulation Results ◽  
The Magnetic Field

The aim of the study is to construct a mathematical model to describe the effect of a magnetic field on the melt crystallization, in particular cast iron. The authors’ research is based on the hypothesis of the certain energy function existence in the short-range order region, which describes the equilibrium state of the "fluid - short-range order" thermodynamic system. Using the hypothesis, we simulated the effect of a magnetic field on the melt crystallization process, which is based on the fundamental laws of statistical physics and thermodynamics and includes four components: a model of the stationary state of the short-range order region, a model for determining the energy function of the short-range order region, a model of the effect of a proportional magnetic field, a model the effects of a commensurate magnetic field on the crystallization of molten iron. Being based on the simulation results, test calculations were performed, the results of which are confirmed by previously known studies. The simulation results showed that the influence of a magnetic field on the crystallization of melts is insignificant in comparison with thermal motion. The authors of the work believe that the magnetic field acts on the region of short-range order at the formation time at a fluctuation temperature that is much lower than the equilibrium one.

Short-range order effects in amorphous FexSi1-x/Si multilayers induced by preparation conditions

1998 ◽  
Vol 08 (PR2) ◽  
pp. Pr2-175-Pr2-178 ◽  
Author(s):  
G. T. Pérez ◽  
F. H. Salas ◽  
R. Morales ◽  
L. M. Álvarez-Prado ◽  
J. M. Alameda
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order ◽  
Order Effects ◽  
Preparation Conditions

SHORT RANGE ORDER IN QUENCHED Ni4Mo

1977 ◽  
Vol 38 (C7) ◽  
pp. C7-173-C7-173
Author(s):  
J.-P. CHEVALIER ◽  
W. M. STOBBS
Keyword(s):  
Short Range ◽  
Short Range Order ◽  
Range Order
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