Study of Magnetic Phase Transition and Spin Frustration in Cobalt Aluminium Oxide Materials based on High Temperature Series Expansions Model

2009 ◽  
Vol 5 (3) ◽  
pp. 301-306
Author(s):  
R. Masrour ◽  
M. Hamedoun
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Aluminium Oxide ◽  
Temperature Series ◽  
Series Expansions ◽  
Oxide Materials ◽  
Spin Frustration

High-pressure magnetic phase transition and galvanomagnetic effects in the high-temperature ferromagnet p-Cd0.7Mn0.3GeAs2

2010 ◽  
Vol 46 (9) ◽  
pp. 919-923 ◽  
Author(s):  
A. Yu. Mollaev ◽  
I. K. Kamilov ◽  
S. F. Marenkin ◽  
R. K. Arslanov ◽  
U. Z. Zalibekov ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
High Temperature ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Galvanomagnetic Effects

scholarly journals Magnetic Phase Transition of MnBi under High Magnetic Fields and High Temperature

2007 ◽  
Vol 48 (9) ◽  
pp. 2414-2418 ◽  
Author(s):  
Keiichi Koyama ◽  
Tetsuya Onogi ◽  
Yoshifuru Mitsui ◽  
Yuko Nakamori ◽  
Shin-ichi Orimo ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
Magnetic Fields ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
High Magnetic Fields

Magnetic properties of the ferrimagnetic spinels systems CoFe2–2xCr2xO4

2008 ◽  
Vol 86 (11) ◽  
pp. 1287-1290 ◽  
Author(s):  
R Masrour ◽  
M Hamedoun ◽  
A Hourmatallah ◽  
K Bouslykhane ◽  
N Benzakour ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Properties ◽  
High Temperature ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Exchange Interactions ◽  
Temperature Series ◽  
Series Expansions ◽  
74.25 Ha ◽  
75.40 Cx

The magnetic properties of a diluted ferrimagnetic spinels system CoFe2–2xCr2xO4 are studied using the high-temperature series expansions method in the range 0 ≤ x ≤ 1. The inter-sublattice exchange interactions (JCo Cr or JCo–Fe) are calculated using the probability law. The high-temperature series expansions, together with the Padé-approximants method, are applied to the spinels systems CoFe2–2xCr2xO4 to determine the magnetic phase diagram, i.e., TC versus dilution x. The critical exponent associated with the magnetic susceptibility (γ) is deduced. PACS Nos.: 75.30.Et; 75.40.Cx; 74.25.Ha, 75.30.Cr

scholarly journals Spin- and chirality-orderings of frustrated magnets – stacked-triangular anti-ferromagnets and spin glasses

2001 ◽  
Vol 79 (11-12) ◽  
pp. 1447-1458 ◽  
Author(s):  
H Kawamura
Keyword(s):  
Phase Transition ◽  
Magnetic Phase Transition ◽  
Triangular Lattice ◽  
Spin Glasses ◽  
Magnetic Phase ◽  
Three Dimensional ◽  
Frustrated Magnets ◽  
Spin Frustration ◽  
Spin Structures ◽  
Experimental Works

"Chirality" is a multispin quantity representing the sense or the handedness of the noncollinear spin structures induced by spin frustration. Recent studies have revealed that the chirality often plays an important role in the ordering of certain frustrated magnets. Here I take up two such examples, stacked-triangular anti-ferromagnets and spin glasses, where the inherent chiral degree of freedom affects underlying physics and might lead to novel ordering phenomena. The first topic is the criticality of the magnetic-phase transition of vector (i.e., XY or Heisenberg) anti-ferromagnets on the three-dimensional stacked-triangular lattice. The second topic is the nature of the spin-glass ordering. I will review the recent theoretical and experimental works on these topics, with particular emphasis on the important role played by the chirality. PACS Nos.: 67.70+n, 67.57Lm

STUDY OF MAGNETIC PROPERTIES OF DILUTED FERRIMAGNETIC SPINELS SYSTEMS BY: HIGH TEMPERATURE SERIES EXPANSIONS

2010 ◽  
Vol 24 (31) ◽  
pp. 6157-6163
Author(s):  
RACHID MASROUR ◽  
MOHAMED HAMEDOUN ◽  
ABDELILAH BENYOUSSEF
Keyword(s):  
Phase Diagram ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
Critical Exponent ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Exchange Interactions ◽  
Temperature Series ◽  
Series Expansions

The ferrimagnetic spinels systems Co x Fe 1-x Cr 2 S 4 has been studied by high-temperature series expansions method in the range 0 ≤x ≤1. The exchange interactions and exchange energies are calculated by using the probability law. The high-temperature series expansions have been applied in the spinels systems Co x Fe 1-x Cr 2 S 4, combined with the Padé approximants method, to determine the magnetic phase diagram, i.e., TC versus dilution x. The critical exponent associated with the magnetic susceptibility (γ) is deduced.

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