CobaltMaghrebV1, PascalFrancis, Corpus, bibRecord, 000118

A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3-x□xCoO3 cobaltites

Identifieur interne : 000118 ( PascalFrancis/Corpus ); précédent : 000117; suivant : 000119

A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3-x□xCoO3 cobaltites

Auteurs : A. Ben Amor ; M. Koubaa ; W. Cheikhrouhou-Koubaa ; A. Cheikhrouhou

Source :

Journal of alloys and compounds [ 0925-8388 ] ; 2009.

RBID : Pascal:09-0055184

Descripteurs français

Pascal (Inist)
- Moment magnétique, Réaction état solide, Composition chimique, Lacune, Effet thermomagnétique, Processus irréversible, Aimantation, Effet champ magnétique, Ordre longue distance, Point Curie, Verre spin, Cobalt Lanthane Strontium Oxyde Mixte, Etat spin, Réseau rhomboédrique, Matériau ferromagnétique, Cobaltite de lanthane et de strontium.

English descriptors

KwdEn :
- Chemical composition, Cobalt Lanthanum Strontium Oxides Mixed, Curie point, Ferromagnetic materials, Irreversible processes, Long-range order, Magnetic field effects, Magnetic moments, Magnetization, Solid state reaction, Spin glasses, Spin state, Thermomagnetic effects, Trigonal lattices, Vacancies.

Abstract

Structural and magnetic properties of La_0.7Sr_0.3-x□_xCoO₃ (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å³ (x=0) to 338.2 Å³ (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co³⁺ (intermediate spin configuration) and Co⁴⁺ (low spin configuration) for 0 < x ≤ 0.125 and Co³⁺ (low spin configuration) and Co⁴⁺ (low spin configuration) for x = 0.15.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A03		`1`		`@0 J. alloys compd.`
A05				`@2 467`
A06				`@2 1-2`
A08	`01`	`1`	`ENG`	`@1 A-site deficiency effects on the structural and magnetic properties of La_0.7Sr_0.3-x□_xCoO₃ cobaltites`
A11	`01`	`1`		`@1 BEN AMOR (A.)`
A11	`02`	`1`		`@1 KOUBAA (M.)`
A11	`03`	`1`		`@1 CHEIKHROUHOU-KOUBAA (W.)`
A11	`04`	`1`		`@1 CHEIKHROUHOU (A.)`
A14	`01`			`@1 Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802 @2 Sfax @3 TUN @Z 1 aut. @Z 2 aut. @Z 3 aut. @Z 4 aut.`
A14	`02`			`@1 Institut NEEL, CNRS, B.P. 166 @2 38042 Grenoble @3 FRA @Z 4 aut.`
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A21				`@1 2009`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 1151 @5 354000184061900210`
A44				`@0 0000 @1 © 2009 INIST-CNRS. All rights reserved.`
A45				`@0 22 ref.`
A47	`01`	`1`		`@0 09-0055184`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of alloys and compounds`
A66	`01`			`@0 CHE`
C01	`01`		`ENG`	@0 Structural and magnetic properties of La_0.7Sr_0.3-x□_xCoO₃ (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å³ (x=0) to 338.2 Å³ (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co³⁺ (intermediate spin configuration) and Co⁴⁺ (low spin configuration) for 0 < x ≤ 0.125 and Co³⁺ (low spin configuration) and Co⁴⁺ (low spin configuration) for x = 0.15.
C02	`01`	`3`		`@0 001B70E60E`
C02	`02`	`3`		`@0 001B70E25`
C03	`01`	`3`	`FRE`	`@0 Moment magnétique @5 02`
C03	`01`	`3`	`ENG`	`@0 Magnetic moments @5 02`
C03	`02`	`X`	`FRE`	`@0 Réaction état solide @5 03`
C03	`02`	`X`	`ENG`	`@0 Solid state reaction @5 03`
C03	`02`	`X`	`SPA`	`@0 Reacción estado sólido @5 03`
C03	`03`	`3`	`FRE`	`@0 Composition chimique @5 04`
C03	`03`	`3`	`ENG`	`@0 Chemical composition @5 04`
C03	`04`	`3`	`FRE`	`@0 Lacune @5 05`
C03	`04`	`3`	`ENG`	`@0 Vacancies @5 05`
C03	`05`	`3`	`FRE`	`@0 Effet thermomagnétique @5 06`
C03	`05`	`3`	`ENG`	`@0 Thermomagnetic effects @5 06`
C03	`06`	`3`	`FRE`	`@0 Processus irréversible @5 07`
C03	`06`	`3`	`ENG`	`@0 Irreversible processes @5 07`
C03	`07`	`3`	`FRE`	`@0 Aimantation @5 08`
C03	`07`	`3`	`ENG`	`@0 Magnetization @5 08`
C03	`08`	`3`	`FRE`	`@0 Effet champ magnétique @5 09`
C03	`08`	`3`	`ENG`	`@0 Magnetic field effects @5 09`
C03	`09`	`3`	`FRE`	`@0 Ordre longue distance @5 10`
C03	`09`	`3`	`ENG`	`@0 Long-range order @5 10`
C03	`10`	`3`	`FRE`	`@0 Point Curie @5 11`
C03	`10`	`3`	`ENG`	`@0 Curie point @5 11`
C03	`11`	`3`	`FRE`	`@0 Verre spin @5 12`
C03	`11`	`3`	`ENG`	`@0 Spin glasses @5 12`
C03	`12`	`X`	`FRE`	`@0 Cobalt Lanthane Strontium Oxyde Mixte @2 NC @2 NA @5 13`
C03	`12`	`X`	`ENG`	`@0 Cobalt Lanthanum Strontium Oxides Mixed @2 NC @2 NA @5 13`
C03	`12`	`X`	`SPA`	`@0 Mixto @2 NC @2 NA @5 13`
C03	`13`	`X`	`FRE`	`@0 Etat spin @5 14`
C03	`13`	`X`	`ENG`	`@0 Spin state @5 14`
C03	`13`	`X`	`SPA`	`@0 Estado espín @5 14`
C03	`14`	`3`	`FRE`	`@0 Réseau rhomboédrique @5 15`
C03	`14`	`3`	`ENG`	`@0 Trigonal lattices @5 15`
C03	`15`	`3`	`FRE`	`@0 Matériau ferromagnétique @5 16`
C03	`15`	`3`	`ENG`	`@0 Ferromagnetic materials @5 16`
C03	`16`	`3`	`FRE`	`@0 Cobaltite de lanthane et de strontium @4 INC @5 63`
N21				`@1 040`

Format Inist (serveur)

NO :	PASCAL 09-0055184 INIST
ET :	A-site deficiency effects on the structural and magnetic properties of La_0.7Sr_0.3-x□_xCoO₃ cobaltites
AU :	BEN AMOR (A.); KOUBAA (M.); CHEIKHROUHOU-KOUBAA (W.); CHEIKHROUHOU (A.)
AF :	Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802/Sfax/Tunisie (1 aut., 2 aut., 3 aut., 4 aut.); Institut NEEL, CNRS, B.P. 166/38042 Grenoble/France (4 aut.)
DT :	Publication en série; Niveau analytique
SO :	Journal of alloys and compounds; ISSN 0925-8388; Suisse; Da. 2009; Vol. 467; No. 1-2; Pp. 78-82; Bibl. 22 ref.
LA :	Anglais
EA :	Structural and magnetic properties of La_0.7Sr_0.3-x□_xCoO₃ (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å³ (x=0) to 338.2 Å³ (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co³⁺ (intermediate spin configuration) and Co⁴⁺ (low spin configuration) for 0 < x ≤ 0.125 and Co³⁺ (low spin configuration) and Co⁴⁺ (low spin configuration) for x = 0.15.
CC :	001B70E60E; 001B70E25
FD :	Moment magnétique; Réaction état solide; Composition chimique; Lacune; Effet thermomagnétique; Processus irréversible; Aimantation; Effet champ magnétique; Ordre longue distance; Point Curie; Verre spin; Cobalt Lanthane Strontium Oxyde Mixte; Etat spin; Réseau rhomboédrique; Matériau ferromagnétique; Cobaltite de lanthane et de strontium
ED :	Magnetic moments; Solid state reaction; Chemical composition; Vacancies; Thermomagnetic effects; Irreversible processes; Magnetization; Magnetic field effects; Long-range order; Curie point; Spin glasses; Cobalt Lanthanum Strontium Oxides Mixed; Spin state; Trigonal lattices; Ferromagnetic materials
SD :	Reacción estado sólido; Mixto; Estado espín
LO :	INIST-1151.354000184061900210
ID :	09-0055184

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Pascal:09-0055184

Le document en format XML

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Sr<sub>0.3-x</sub>
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CoO<sub>3</sub>
 cobaltites</title>
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CoO<sub>3</sub>
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<term>Irreversible processes</term>
<term>Long-range order</term>
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<term>Effet thermomagnétique</term>
<term>Processus irréversible</term>
<term>Aimantation</term>
<term>Effet champ magnétique</term>
<term>Ordre longue distance</term>
<term>Point Curie</term>
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<term>Cobalt Lanthane Strontium Oxyde Mixte</term>
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<front><div type="abstract" xml:lang="en">Structural and magnetic properties of La<sub>0.7</sub>
Sr<sub>0.3-x</sub>
□<sub>x</sub>
CoO<sub>3</sub>
 (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å<sup>3</sup>
 (x=0) to 338.2 Å<sup>3</sup>
 (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co<sup>3+</sup>
 (intermediate spin configuration) and Co<sup>4+</sup>
 (low spin configuration) for 0 < x ≤ 0.125 and Co<sup>3+</sup>
 (low spin configuration) and Co<sup>4+</sup>
 (low spin configuration) for x = 0.15.</div>
</front>
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Sr<sub>0.3-x</sub>
□<sub>x</sub>
CoO<sub>3</sub>
 cobaltites</s1>
</fA08>
<fA11 i1="01" i2="1"><s1>BEN AMOR (A.)</s1>
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<s2>Sfax</s2>
<s3>TUN</s3>
<sZ>1 aut.</sZ>
<sZ>2 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
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<fA14 i1="02"><s1>Institut NEEL, CNRS, B.P. 166</s1>
<s2>38042 Grenoble</s2>
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<fC01 i1="01" l="ENG"><s0>Structural and magnetic properties of La<sub>0.7</sub>
Sr<sub>0.3-x</sub>
□<sub>x</sub>
CoO<sub>3</sub>
 (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å<sup>3</sup>
 (x=0) to 338.2 Å<sup>3</sup>
 (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co<sup>3+</sup>
 (intermediate spin configuration) and Co<sup>4+</sup>
 (low spin configuration) for 0 < x ≤ 0.125 and Co<sup>3+</sup>
 (low spin configuration) and Co<sup>4+</sup>
 (low spin configuration) for x = 0.15.</s0>
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<fC03 i1="01" i2="3" l="FRE"><s0>Moment magnétique</s0>
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<fC03 i1="01" i2="3" l="ENG"><s0>Magnetic moments</s0>
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<s5>04</s5>
</fC03>
<fC03 i1="03" i2="3" l="ENG"><s0>Chemical composition</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE"><s0>Lacune</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG"><s0>Vacancies</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="3" l="FRE"><s0>Effet thermomagnétique</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="3" l="ENG"><s0>Thermomagnetic effects</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="3" l="FRE"><s0>Processus irréversible</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="3" l="ENG"><s0>Irreversible processes</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="3" l="FRE"><s0>Aimantation</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="3" l="ENG"><s0>Magnetization</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="3" l="FRE"><s0>Effet champ magnétique</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="3" l="ENG"><s0>Magnetic field effects</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="3" l="FRE"><s0>Ordre longue distance</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="3" l="ENG"><s0>Long-range order</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="3" l="FRE"><s0>Point Curie</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="3" l="ENG"><s0>Curie point</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="3" l="FRE"><s0>Verre spin</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="3" l="ENG"><s0>Spin glasses</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Cobalt Lanthane Strontium Oxyde Mixte</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Cobalt Lanthanum Strontium Oxides Mixed</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Mixto</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE"><s0>Etat spin</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG"><s0>Spin state</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA"><s0>Estado espín</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="3" l="FRE"><s0>Réseau rhomboédrique</s0>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="3" l="ENG"><s0>Trigonal lattices</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="3" l="FRE"><s0>Matériau ferromagnétique</s0>
<s5>16</s5>
</fC03>
<fC03 i1="15" i2="3" l="ENG"><s0>Ferromagnetic materials</s0>
<s5>16</s5>
</fC03>
<fC03 i1="16" i2="3" l="FRE"><s0>Cobaltite de lanthane et de strontium</s0>
<s4>INC</s4>
<s5>63</s5>
</fC03>
<fN21><s1>040</s1>
</fN21>
</pA>
</standard>
<server><NO>PASCAL 09-0055184 INIST</NO>
<ET>A-site deficiency effects on the structural and magnetic properties of La<sub>0.7</sub>
Sr<sub>0.3-x</sub>
□<sub>x</sub>
CoO<sub>3</sub>
 cobaltites</ET>
<AU>BEN AMOR (A.); KOUBAA (M.); CHEIKHROUHOU-KOUBAA (W.); CHEIKHROUHOU (A.)</AU>
<AF>Laboratoire de Physique des Matériaux, Faculté des Sciences de Sfax, B.P. 802/Sfax/Tunisie (1 aut., 2 aut., 3 aut., 4 aut.); Institut NEEL, CNRS, B.P. 166/38042 Grenoble/France (4 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Journal of alloys and compounds; ISSN 0925-8388; Suisse; Da. 2009; Vol. 467; No. 1-2; Pp. 78-82; Bibl. 22 ref.</SO>
<LA>Anglais</LA>
<EA>Structural and magnetic properties of La<sub>0.7</sub>
Sr<sub>0.3-x</sub>
□<sub>x</sub>
CoO<sub>3</sub>
 (0≤x≤0.15) samples have been investigated. Powder samples have been synthesized using the solid state reaction method at high temperature. All our samples crystallize in the rhombohedral structure with R3c space group. With increasing Sr-deficiency amount, the unit cell volume decreases from 341.4 Å<sup>3</sup>
 (x=0) to 338.2 Å<sup>3</sup>
 (x=0.15). Our samples exhibit thermo-magnetic irreversibility behavior in the magnetization data in a magnetic applied field of 50 mT, which indicates the absence of long range ferromagnetic order. The Curie temperature decreases from 225 K (x = 0) to 180 K (x=0.1). Sample with high deficient amount (x=0.15) becomes predominantly spin glass phase. The effective magnetic moments values obtained from the Curie constant are close to that of the Co<sup>3+</sup>
 (intermediate spin configuration) and Co<sup>4+</sup>
 (low spin configuration) for 0 < x ≤ 0.125 and Co<sup>3+</sup>
 (low spin configuration) and Co<sup>4+</sup>
 (low spin configuration) for x = 0.15.</EA>
<CC>001B70E60E; 001B70E25</CC>
<FD>Moment magnétique; Réaction état solide; Composition chimique; Lacune; Effet thermomagnétique; Processus irréversible; Aimantation; Effet champ magnétique; Ordre longue distance; Point Curie; Verre spin; Cobalt Lanthane Strontium Oxyde Mixte; Etat spin; Réseau rhomboédrique; Matériau ferromagnétique; Cobaltite de lanthane et de strontium</FD>
<ED>Magnetic moments; Solid state reaction; Chemical composition; Vacancies; Thermomagnetic effects; Irreversible processes; Magnetization; Magnetic field effects; Long-range order; Curie point; Spin glasses; Cobalt Lanthanum Strontium Oxides Mixed; Spin state; Trigonal lattices; Ferromagnetic materials</ED>
<SD>Reacción estado sólido; Mixto; Estado espín</SD>
<LO>INIST-1151.354000184061900210</LO>
<ID>09-0055184</ID>
</server>
</inist>
</record>

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A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3-x□xCoO3 cobaltites

A-site deficiency effects on the structural and magnetic properties of La0.7Sr0.3-x□xCoO3 cobaltites

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