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Study of Magnetic Phase Transition in Diluted Nanostructure Spinel Ferrites

Identifieur interne : 000239 ( PascalFrancis/Curation ); précédent : 000238; suivant : 000240

Study of Magnetic Phase Transition in Diluted Nanostructure Spinel Ferrites

Auteurs : R. Masrour [Maroc] ; M. Hamedoun [Maroc] ; A. Benyoussef [Maroc]

Source :

RBID : Pascal:12-0213778

Descripteurs français

English descriptors

Abstract

The magnetic properties of CoFe2-2xCr2xO4 spinels are studied by different theoretical methods: the mean field theory, the high-temperature series expansions (MFT, HTSE) and the probability distribution law with the different size L (nm). The exchange interactions and the critical temperature Tc. (K) are given for the nano-spinel ferrites. The magnetic phase diagram of CoFe2-2xCr2xO4 is deduced. The saturation magnetization, the coercivity field and magnetic energy are obtained.
pA  
A01 01  1    @0 1557-1939
A03   1    @0 J. supercond. nov. magn.
A05       @2 24
A06       @2 8
A08 01  1  ENG  @1 Study of Magnetic Phase Transition in Diluted Nanostructure Spinel Ferrites
A11 01  1    @1 MASROUR (R.)
A11 02  1    @1 HAMEDOUN (M.)
A11 03  1    @1 BENYOUSSEF (A.)
A14 01      @1 LMPHE, Faculté des Sciences, Université Mohamed V @2 Rabat @3 MAR @Z 1 aut. @Z 3 aut.
A14 02      @1 Laboratory of Materials, Processes, Environment and Quality, Cady Ayyed University, National School of Applied Sciences @2 Safi @3 MAR @Z 1 aut.
A14 03      @1 Institute for Nanomaterials and Nanotechnologies @2 Rabat @3 MAR @Z 2 aut. @Z 3 aut.
A14 04      @1 Academie Hassan II des Sciences et Techniques @2 Rabat @3 MAR @Z 2 aut. @Z 3 aut.
A20       @1 2321-2324
A21       @1 2011
A23 01      @0 ENG
A43 01      @1 INIST @2 21987 @5 354000506932180190
A44       @0 0000 @1 © 2012 INIST-CNRS. All rights reserved.
A45       @0 32 ref.
A47 01  1    @0 12-0213778
A60       @1 P
A61       @0 A
A64 01  1    @0 Journal of superconductivity and novel magnetism
A66 01      @0 USA
C01 01    ENG  @0 The magnetic properties of CoFe2-2xCr2xO4 spinels are studied by different theoretical methods: the mean field theory, the high-temperature series expansions (MFT, HTSE) and the probability distribution law with the different size L (nm). The exchange interactions and the critical temperature Tc. (K) are given for the nano-spinel ferrites. The magnetic phase diagram of CoFe2-2xCr2xO4 is deduced. The saturation magnetization, the coercivity field and magnetic energy are obtained.
C02 01  3    @0 001B70E75
C03 01  3  FRE  @0 Transition magnétique @5 02
C03 01  3  ENG  @0 Magnetic transitions @5 02
C03 02  3  FRE  @0 Composition chimique @5 03
C03 02  3  ENG  @0 Chemical composition @5 03
C03 03  X  FRE  @0 Approximation champ moyen @5 04
C03 03  X  ENG  @0 Mean field approximation @5 04
C03 03  X  SPA  @0 Aproximación campo medio @5 04
C03 04  3  FRE  @0 Développement série @5 06
C03 04  3  ENG  @0 Series expansion @5 06
C03 05  X  FRE  @0 Loi probabilité @5 07
C03 05  X  ENG  @0 Probability distribution @5 07
C03 05  X  SPA  @0 Ley probabilidad @5 07
C03 06  3  FRE  @0 Interaction échange @5 08
C03 06  3  ENG  @0 Exchange interactions @5 08
C03 07  3  FRE  @0 Point critique @5 09
C03 07  3  ENG  @0 Critical points @5 09
C03 08  3  FRE  @0 Diagramme phase magnétique @5 10
C03 08  3  ENG  @0 Magnetic-phase diagrams @5 10
C03 09  X  FRE  @0 Aimantation saturation @5 11
C03 09  X  ENG  @0 Saturation magnetization @5 11
C03 09  X  SPA  @0 Imanación saturación @5 11
C03 10  3  FRE  @0 Force coercitive @5 12
C03 10  3  ENG  @0 Coercive force @5 12
C03 11  3  FRE  @0 Effet champ magnétique @5 13
C03 11  3  ENG  @0 Magnetic field effects @5 13
C03 12  X  FRE  @0 Chrome Cobalt Fer Oxyde Mixte @2 NC @2 NA @5 14
C03 12  X  ENG  @0 Chromium Cobalt Iron Oxides Mixed @2 NC @2 NA @5 14
C03 12  X  SPA  @0 Mixto @2 NC @2 NA @5 14
C03 13  3  FRE  @0 Nanoparticule @5 15
C03 13  3  ENG  @0 Nanoparticles @5 15
C03 14  X  FRE  @0 Ferrites spinelles @5 16
C03 14  X  ENG  @0 Ferrites spinels @5 16
C03 14  X  SPA  @0 Feritas espinelas @5 16
C03 15  3  FRE  @0 Ferrite de chrome et de cobalt @4 INC @5 63
N21       @1 163

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<term>Chemical composition</term>
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<term>Coercive force</term>
<term>Critical points</term>
<term>Exchange interactions</term>
<term>Ferrites spinels</term>
<term>Magnetic field effects</term>
<term>Magnetic transitions</term>
<term>Magnetic-phase diagrams</term>
<term>Mean field approximation</term>
<term>Nanoparticles</term>
<term>Probability distribution</term>
<term>Saturation magnetization</term>
<term>Series expansion</term>
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<term>Transition magnétique</term>
<term>Composition chimique</term>
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<term>Développement série</term>
<term>Loi probabilité</term>
<term>Interaction échange</term>
<term>Point critique</term>
<term>Diagramme phase magnétique</term>
<term>Aimantation saturation</term>
<term>Force coercitive</term>
<term>Effet champ magnétique</term>
<term>Chrome Cobalt Fer Oxyde Mixte</term>
<term>Nanoparticule</term>
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<term>Ferrite de chrome et de cobalt</term>
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<div type="abstract" xml:lang="en">The magnetic properties of CoFe
<sub>2-2x</sub>
Cr
<sub>2x</sub>
O
<sub>4</sub>
spinels are studied by different theoretical methods: the mean field theory, the high-temperature series expansions (MFT, HTSE) and the probability distribution law with the different size L (nm). The exchange interactions and the critical temperature T
<sub>c</sub>
. (K) are given for the nano-spinel ferrites. The magnetic phase diagram of CoFe
<sub>2-2x</sub>
Cr
<sub>2x</sub>
O
<sub>4</sub>
is deduced. The saturation magnetization, the coercivity field and magnetic energy are obtained.</div>
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<s0>The magnetic properties of CoFe
<sub>2-2x</sub>
Cr
<sub>2x</sub>
O
<sub>4</sub>
spinels are studied by different theoretical methods: the mean field theory, the high-temperature series expansions (MFT, HTSE) and the probability distribution law with the different size L (nm). The exchange interactions and the critical temperature T
<sub>c</sub>
. (K) are given for the nano-spinel ferrites. The magnetic phase diagram of CoFe
<sub>2-2x</sub>
Cr
<sub>2x</sub>
O
<sub>4</sub>
is deduced. The saturation magnetization, the coercivity field and magnetic energy are obtained.</s0>
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<s0>Series expansion</s0>
<s5>06</s5>
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<fC03 i1="05" i2="X" l="FRE">
<s0>Loi probabilité</s0>
<s5>07</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Probability distribution</s0>
<s5>07</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Ley probabilidad</s0>
<s5>07</s5>
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<s0>Interaction échange</s0>
<s5>08</s5>
</fC03>
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<s0>Exchange interactions</s0>
<s5>08</s5>
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<fC03 i1="07" i2="3" l="FRE">
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<s5>10</s5>
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<s5>10</s5>
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<s0>Aimantation saturation</s0>
<s5>11</s5>
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<fC03 i1="09" i2="X" l="ENG">
<s0>Saturation magnetization</s0>
<s5>11</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA">
<s0>Imanación saturación</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE">
<s0>Force coercitive</s0>
<s5>12</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG">
<s0>Coercive force</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE">
<s0>Effet champ magnétique</s0>
<s5>13</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG">
<s0>Magnetic field effects</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE">
<s0>Chrome Cobalt Fer Oxyde Mixte</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG">
<s0>Chromium Cobalt Iron Oxides Mixed</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>14</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA">
<s0>Mixto</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE">
<s0>Nanoparticule</s0>
<s5>15</s5>
</fC03>
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<s0>Nanoparticles</s0>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE">
<s0>Ferrites spinelles</s0>
<s5>16</s5>
</fC03>
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<s0>Ferrites spinels</s0>
<s5>16</s5>
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<s0>Feritas espinelas</s0>
<s5>16</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE">
<s0>Ferrite de chrome et de cobalt</s0>
<s4>INC</s4>
<s5>63</s5>
</fC03>
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