Effects of disorder on the ferromagnetic relaxation of Co2+ in lithium ferrite

I. K. Pukhov; V. N. Seleznev; V. N. Berzhanskii

doi:10.1007/bf00821298

Effects of disorder on the ferromagnetic relaxation of Co2+ in lithium ferrite

Soviet Physics Journal ◽

10.1007/bf00821298 ◽

1972 ◽

Vol 15 (1) ◽

pp. 87-88 ◽

Cited By ~ 1

Author(s):

I. K. Pukhov ◽

V. N. Seleznev ◽

V. N. Berzhanskii

Keyword(s):

Lithium Ferrite ◽

Effects Of Disorder ◽

Ferromagnetic Relaxation

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The effect of Tin additionon on Structural and magnetic properties of the stannoferrite Li0.5+0.5XFe2.5-1.5XSnXO4

JOURNAL OF ADVANCES IN PHYSICS ◽

10.24297/jap.v12i3.9 ◽

2016 ◽

Vol 12 (3) ◽

pp. 4307-4321 ◽

Cited By ~ 1

Author(s):

Ahmed Hassan Ibrahim ◽

Yehia Abbas

Keyword(s):

Particle Size ◽

Fine Particles ◽

Magnetic Moments ◽

Lithium Ferrite ◽

Tem Analysis ◽

Weiss Temperature ◽

X Ray ◽

Two Phases ◽

Nanocrystalline Ferrite ◽

20 Nm

The physical properties of ferrites are verysensitive to microstructure, which in turn critically dependson the manufacturing process.Nanocrystalline Lithium Stannoferrite system Li0.5+0.5XFe2.5-1.5XSnXO4,X= (0, 0.2, 0.4, 0.6, 0.8 and 1.0) fine particles were successfully prepared by double sintering ceramic technique at pre-sintering temperature of 500oC for 3 h andthepre-sintered material was crushed and sintered finally in air at 1000oC.The structural and microstructural evolutions of the nanophase have been studied using X-ray powder diffraction (XRD) and the Rietveld method.The refinement results showed that the nanocrystalline ferrite has a two phases of ordered and disordered phases for polymorphous lithium Stannoferrite.The particle size of as obtained samples were found to be ~20 nm through TEM that increases up to ~ 85 nmand isdependent on the annealing temperature. TEM micrograph reveals that the grains of sample are spherical in shape. (TEM) analysis confirmed the X-ray results.The particle size of stannic substituted lithium ferrite fine particle obtained from the XRD using Scherrer equation.Magneticmeasurements obtained from lake shoreâ€™s vibrating sample magnetometer (VSM), saturation magnetization ofordered LiFe5O8 was found to be (57.829 emu/g) which was lower than disordered LiFe5O8(62.848 emu/g).Theinterplay between superexchange interactions of Fe3+ ions at A and B sublattices gives rise to ferrimagnetic ordering of magnetic moments,with a high Curie-Weiss temperature (TCW ~ 900 K).

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Synthesis, Structure and Dielectric Properties of Magnesium-substituted Lithium Ferrite

Journal of Nano- and Electronic Physics ◽

10.21272/jnep.8(4(2)).04066 ◽

2016 ◽

Vol 8 (4(2)) ◽

pp. 04066-1-04066-6

Author(s):

L. S. Kaykan ◽

◽

J. S. Kaykan ◽

I. P. Yaremiy ◽

O. M. Ugorchuk ◽

...

Keyword(s):

Dielectric Properties ◽

Lithium Ferrite

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Note on the Back Reaction Term in Ferromagnetic Relaxation Equations

Journal of Applied Physics ◽

10.1063/1.1736080 ◽

1961 ◽

Vol 32 (4) ◽

pp. 738-738 ◽

Cited By ~ 3

Author(s):

Herbert Callen

Keyword(s):

Back Reaction ◽

Reaction Term ◽

Ferromagnetic Relaxation

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EFFECTS OF HOLE-DOPING AND DISORDER ON THE MAGNETIC STATES OF DELAFOSSITE CuCrO2 HAVING A SPIN-3/2 ANTIFERROMAGNETIC TRIANGULAR SUBLATTICE

International Journal of Modern Physics B ◽

10.1142/s0217979213300028 ◽

2013 ◽

Vol 27 (05) ◽

pp. 1330002 ◽

Cited By ~ 10

Author(s):

TETSUJI OKUDA ◽

RYOICHI KAJIMOTO ◽

MARIO OKAWA ◽

TOMOHIKO SAITOH

Keyword(s):

Physical Properties ◽

Hole Doping ◽

Spin Liquid ◽

Effects Of Disorder ◽

Magnetic States

In this review, we will discuss the effects of itinerant hole and disorder produced by substitutions on the magnetic states of polycrystalline delafossite oxide CuCrO 2 having a spin-3/2 antiferromagnetic triangular sublattice. First, we will show the effects of hole-doping by the substitution of nonmagnetic Mg 2+ for magnetic Cr 3+ on the physical properties of CuCrO 2, and will discuss the origin of nontrivial promotion of the 120° Néel state due to the coupling between the itinerant hole and localized spin. Next, we will show the effects of disorder introduced by the isovalent substitutions such as the nonmagnetic Ag + substitution for nonmagnetic Cu + and the nonmagnetic Al 3+ one for magnetic Cr 3+, and will discuss the possibility of appearance of unusual magnetic states such as spin liquid or spin nematic states.

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