Concentration Phase Transitions in Two-Sublattice Magnets

2012 ◽  
Vol 557-559 ◽  
pp. 731-734 ◽  
Author(s):  
Valery I. Belokon ◽  
Konstantin V. Nefedev ◽  
Olga I. Dyachenko
Keyword(s):  
Phase Transitions ◽  
Exchange Interaction ◽  
Critical Phenomena ◽  
Random Fields ◽  
Magnetic Phase ◽  
Critical Concentration ◽  
Magnetic Phase Transitions ◽  
System Of Equations ◽  
Sublattice Model ◽  
Interaction Method

Phase transitions and critical phenomena are investigated within a two-sublattice model. In the framework of the random fields with the exchange interaction method the system of equations is obtained. It allows us to establish conditions under which magnetic phase transitions are possible. Critical concentration of ferromagnetic atoms which is necessary for the existence of ferromagnetic, ferrimagnetic and antiferromagnetic phases is determined.

Influence of the f-d exchange interaction on the field-induced magnetic phase transitions in the Y1−tGdtCo3 intermetallics

1995 ◽  
Vol 211 (1-4) ◽  
pp. 87-89 ◽  
Author(s):  
H. Aruga Katori ◽  
I.S. Dubenko ◽  
I.Yu. Gaidukova ◽  
T. Goto ◽  
R.Z. Levitin ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Exchange Interaction ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions

scholarly journals Effect of the Interatomic Exchange Interaction on the Magnetic Phase Transitions in Spin Crossover Systems under High-Pressure

2018 ◽  
Vol 60 (6) ◽  
pp. 1177-1179 ◽  
Author(s):  
S. G. Ovchinnikov ◽  
Yu. S. Orlov ◽  
S. V. Nikolaev ◽  
A. I. Nesterov ◽  
T. M. Ovchinnikova
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Exchange Interaction ◽  
Spin Crossover ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions

Phase Diagrams of Ni2MnX (X = In, Sn, Sb) Heusler Alloys with Inversion of Exchange Interaction

2008 ◽  
Vol 583 ◽  
pp. 131-146 ◽  
Author(s):  
Vasiliy D. Buchelnikov ◽  
Sergey Taskaev ◽  
M.A. Zagrebin ◽  
Peter Entel
Keyword(s):  
Free Energy ◽  
Phase Transitions ◽  
Exchange Interaction ◽  
Phase Diagrams ◽  
Magnetic Phase ◽  
Landau Theory ◽  
Heusler Alloys ◽  
Magnetic Phase Transitions ◽  
Experimental Phase ◽  
Ginzburg Landau

In this work with the help of the phenomenological Ginzburg-Landau theory of structural and magnetic phase transitions the phase diagrams of Heusler Ni-Mn-X (X = In, Sn, Sb) alloys with the inversion of exchange interaction are investigated. The investigation shows that the type of the phase diagrams in Heusler Ni-Mn-X (X = In, Sn, Sb) alloys depends on the value and sign of the free energy parameters. As it is seen from the analysis of the phase diagrams with the determined values and signs of the parameters of Landau functional there are thermodynamic paths which allow to explain experimental phase transitions in Heusler alloys Ni-Mn-X (X = In, Sn, Sb) and Ni-Co- Mn-X (X = In, Sn, Sb) qualitatively.

Evolution of exchange interaction constants across magnetic phase transitions in the chromium spinel oxideCdCr2O4

2015 ◽  
Vol 92 (14) ◽  
Author(s):  
Shojiro Kimura ◽  
Yuya Sawada ◽  
Yasuo Narumi ◽  
Kazuo Watanabe ◽  
Masayuki Hagiwara ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Exchange Interaction ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Chromium Spinel

scholarly journals Magnetic phase transitions in Eu( Co1−xNix)2−yAs2 single crystals

2020 ◽  
Vol 4 (8) ◽  
Author(s):  
N. S. Sangeetha ◽  
Santanu Pakhira ◽  
D. H. Ryan ◽  
V. Smetana ◽  
A.-V. Mudring ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Single Crystals ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions
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