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.

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

MAGNETIC PROPERTIES OF PSEUDO-BINARY Mn1−xFexSn2 ALLOYS

1993 ◽  
Vol 07 (01n03) ◽  
pp. 867-870 ◽  
Author(s):  
H. SHIRAISHI ◽  
T. HORI ◽  
Y. YAMAGUCHI ◽  
S. FUNAHASHI ◽  
K. KANEMATSU
Keyword(s):  
Field Theory ◽  
Phase Diagram ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
High Temperature ◽  
Magnetic Structure ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Molecular Field ◽  
Magnetic Phases

The magnetic susceptibility measurements have been made on antiferromagnetic compounds Mn1–xFexSn2 and the magnetic phase diagram was illustrated. The high temperature magnetic phases I and III, major phases, were analyzed on the basis of molecular field theory and explained the change of magnetic structure I⇌III occured at x≈0.8.

MAGNETIC PROPERTIES OF Ti-Co SOLID SOLUTIONS

1999 ◽  
Vol 13 (08) ◽  
pp. 233-238
Author(s):  
IULIU POP ◽  
OLIVIA POP
Keyword(s):  
Phase Diagram ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Critical Temperature ◽  
Fermi Level ◽  
Solid Solutions ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Main Mechanism ◽  
Thermal Variation

Thermal variation of the magnetic susceptibility for Ti-Co solid solutions is reported. Cobalt, by alloying acts on the transition Néel temperature giving rise to a complicated magnetic phase diagram. The change of the Fermi level is the main mechanism in the critical temperature, T N , shift.

Magnetic properties of NiAlxFe2−xO4 spinels: A mean field approach and high-temperature series expansions study

2018 ◽  
Vol 32 (07) ◽  
pp. 1850070 ◽  
Author(s):  
S. Salmi ◽  
R. Masrour ◽  
A. El Grini ◽  
K. Bouslykhane ◽  
A. Hourmatallah ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Critical Temperature ◽  
Magnetic Measurement ◽  
Mean Field Theory ◽  
Mean Field ◽  
Exchange Interactions ◽  
Temperature Series ◽  
Series Expansions ◽  
Good Agreement

The magnetic properties of NiAl[Formula: see text]Fe[Formula: see text]O4 (NAFO) spinels were studied. Influence of Al doping on magnetic properties of NiFe2O4 spinel were examined. The exchange interactions in NAFO were obtained. The general expression of saturation magnetization and the critical temperature were obtained using mean field theory. The high-temperature series expansions combined with the Padé approximant are given to determine the critical temperature of NAFO. The critical exponent associated with the magnetic susceptibility [Formula: see text] was also deduced. The obtained results were in good agreement with magnetic measurement.

Effect of Zn Substitution on Magnetic Properties of CuFe 2 O 4 : a High-Temperature Series Expansions Study

2018 ◽  
Vol 35 (1) ◽  
pp. 017501 ◽  
Author(s):  
S. Salmi ◽  
R. Masrour ◽  
A. El Grini ◽  
K. Bouslykhane ◽  
A. Hourmatallah ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
High Temperature ◽  
Temperature Series ◽  
Series Expansions ◽  
Zn Substitution

Magnetic Phase Diagram and Charge Transport in TmB12

2009 ◽  
Vol 152-153 ◽  
pp. 45-48 ◽  
Author(s):  
A.V. Bogach ◽  
S.V. Demishev ◽  
K. Flachbart ◽  
S. Gabani ◽  
V.V. Glushkov ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Magnetic Susceptibility ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Numerical Differentiation ◽  
Simple Relation ◽  
Paramagnetic State ◽  
Precision Measurements ◽  
Bulk Susceptibility ◽  
Ordered Phases

High precision measurements of magnetoresistance =f(T,H) and magnetization M(T,H) have been carried out on single crystals of rare earth dodecaboride TmB12 at temperatures 1.8–30 K in magnetic fields up to 80 kOe. The high accuracy measurements and precise temperature stabilization allowed us to perform numerical differentiation and analyze quantitatively a behavior of derivative d()/dH=f(T,H) and magnetic susceptibility (T,H)=dM/dH in paramagnetic and magnetically ordered phases of thulium dodecaboride. It was shown that negative magnetoresistance anomalies observed in present study in paramagnetic state of TmB12 can be consistently interpreted in frameworks of a simple relation between resistivity and magnetization - /M2 proposed by K. Yosida (Phys. Rev., 107, 396 (1957)). A local magnetic susceptibility loc(T,H)=(1/H(d(/)/dH))1/2 was deduced directly from the magnetoresistance measurements and compared with bulk susceptibility (T,H)=dM/dH results of the present study. Moreover, the susceptibility dependences loc(T,H) and (T,H) have been applied to analyze in detail the H-T magnetic phase diagram of TmB12.

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