CobaltMaghrebV1, PascalFrancis, Checkpoint, bibRecord, 000160

Nuclear and magnetic structures and magnetic properties of the layered cobalt hydroxysulfate Co5(OH)6(SO4)2(H2O)4 and its deuterated analogue, Co5(OD)6(SO4)2(D2O)4

Identifieur interne : 000160 ( PascalFrancis/Checkpoint ); précédent : 000159; suivant : 000161

Nuclear and magnetic structures and magnetic properties of the layered cobalt hydroxysulfate Co5(OH)6(SO4)2(H2O)4 and its deuterated analogue, Co5(OD)6(SO4)2(D2O)4

Auteurs : Mohsen Ben Salah [France] ; Serge Vilminot [France] ; Gilles Andre [France] ; Mireille Richard-Plouet [France] ; Tahar Mhiri [Tunisie] ; Seishi Takagi [Japon] ; Mohamedally Kurmoo [France]

Source :

Journal of the American Chemical Society [ 0002-7863 ] ; 2006.

RBID : Pascal:06-0477951

Descripteurs français

Pascal (Inist)
- Synthèse minérale, Cobalt Complexe, Complexe polynucléaire, Complexe aqua, Complexe hydroxo, Complexe sulfato, Structure stratifiée, Structure moléculaire, Structure cristalline, Propriété magnétique, Anisotropie magnétique, Susceptibilité magnétique, Magnétomètre SQUID, Diffraction RX, Deutérium Oxyde, 6166F.

English descriptors

KwdEn :
- Aqua complex, Cobalt Complexes, Crystalline structure, Hydroxo complex, Inorganic synthesis, Laminated structure, Magnetic anisotropy, Magnetic properties, Magnetic susceptibility, Molecular structure, Polynuclear complex, SQUID magnetometers, Sulfato complex, X ray diffraction.

Abstract

The structures (nuclear and magnetic), magnetic properties (2-300 K, 1-10⁴ bar), and heat capacity of the layered ferromagnet Co₅(OH)₆(SO₄)₂(H₂O)₄ are reported. The crystal structure consists of brucite-like M^II-OH layers of edge-sharing octahedra, but having two different Co sites, which are pillared by ...O₃SO-Co(H₂O)₄-OSO₃.... The absorption spectrum confirms the presence of divalent Co, and by comparison of the two isotopic materials, the assignment of the vibrational spectra is proposed. The magnetic properties are those of a ferromagnet with a Curie temperature of 14 K. Temperature and field dependence magnetization data taken on an aligned sample suggest an easy-plane magnet. The Curie temperature increases linearly with pressure at a rate of +0.12 K/kbar, suggesting small progressive and uniform modifications of the Co-Co exchange interactions. Rietveld refinement of the neutron powder diffraction data and consideration of a group analysis reveal the direction of the moments of the Co within the layer to be along the b-axis, with a maximum moment of 3.33 μ_B per cobalt. Those of the pillars remain random. Estimation of the entropy from the heat capacity data accounts for the presence of four ordered moments of Co with spin 1/2 at the long-range ordering temperature, while the moment of the pillaring Co contributes only at lower temperature due to the increase of the internal field as the temperature is lowered. The purely 2D-magnetic ordering in an easy-plane magnet, evidenced by neutron diffraction and heat capacity, challenges the existing theories and is a rare example of a single-layer magnet.

Affiliations:

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Le document en format XML

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(OH)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(H<sub>2</sub>
O)<sub>4</sub>
 and its deuterated analogue, Co<sub>5</sub>
(OD)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(D<sub>2</sub>
O)<sub>4</sub>
</title>
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(OH)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(H<sub>2</sub>
O)<sub>4</sub>
 and its deuterated analogue, Co<sub>5</sub>
(OD)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(D<sub>2</sub>
O)<sub>4</sub>
</title>
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<s3>FRA</s3>
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<s2>44322 Nantes</s2>
<s3>FRA</s3>
<sZ>4 aut.</sZ>
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<s3>TUN</s3>
<sZ>5 aut.</sZ>
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<sZ>6 aut.</sZ>
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<s2>67000 Strasbourg</s2>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aqua complex</term>
<term>Cobalt Complexes</term>
<term>Crystalline structure</term>
<term>Hydroxo complex</term>
<term>Inorganic synthesis</term>
<term>Laminated structure</term>
<term>Magnetic anisotropy</term>
<term>Magnetic properties</term>
<term>Magnetic susceptibility</term>
<term>Molecular structure</term>
<term>Polynuclear complex</term>
<term>SQUID magnetometers</term>
<term>Sulfato complex</term>
<term>X ray diffraction</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Synthèse minérale</term>
<term>Cobalt Complexe</term>
<term>Complexe polynucléaire</term>
<term>Complexe aqua</term>
<term>Complexe hydroxo</term>
<term>Complexe sulfato</term>
<term>Structure stratifiée</term>
<term>Structure moléculaire</term>
<term>Structure cristalline</term>
<term>Propriété magnétique</term>
<term>Anisotropie magnétique</term>
<term>Susceptibilité magnétique</term>
<term>Magnétomètre SQUID</term>
<term>Diffraction RX</term>
<term>Deutérium Oxyde</term>
<term>6166F</term>
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<front><div type="abstract" xml:lang="en">The structures (nuclear and magnetic), magnetic properties (2-300 K, 1-10<sup>4</sup>
 bar), and heat capacity of the layered ferromagnet Co<sub>5</sub>
(OH)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(H<sub>2</sub>
O)<sub>4</sub>
 are reported. The crystal structure consists of brucite-like M<sup>II</sup>
-OH layers of edge-sharing octahedra, but having two different Co sites, which are pillared by ...O<sub>3</sub>
SO-Co(H<sub>2</sub>
O)<sub>4</sub>
-OSO<sub>3</sub>
.... The absorption spectrum confirms the presence of divalent Co, and by comparison of the two isotopic materials, the assignment of the vibrational spectra is proposed. The magnetic properties are those of a ferromagnet with a Curie temperature of 14 K. Temperature and field dependence magnetization data taken on an aligned sample suggest an easy-plane magnet. The Curie temperature increases linearly with pressure at a rate of +0.12 K/kbar, suggesting small progressive and uniform modifications of the Co-Co exchange interactions. Rietveld refinement of the neutron powder diffraction data and consideration of a group analysis reveal the direction of the moments of the Co within the layer to be along the b-axis, with a maximum moment of 3.33 μ<sub>B</sub>
 per cobalt. Those of the pillars remain random. Estimation of the entropy from the heat capacity data accounts for the presence of four ordered moments of Co with spin 1/2 at the long-range ordering temperature, while the moment of the pillaring Co contributes only at lower temperature due to the increase of the internal field as the temperature is lowered. The purely 2D-magnetic ordering in an easy-plane magnet, evidenced by neutron diffraction and heat capacity, challenges the existing theories and is a rare example of a single-layer magnet.</div>
</front>
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(OH)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(H<sub>2</sub>
O)<sub>4</sub>
 and its deuterated analogue, Co<sub>5</sub>
(OD)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(D<sub>2</sub>
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<s2>91191 Gif-sur-Yvette</s2>
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<sZ>3 aut.</sZ>
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<fA14 i1="03"><s1>Institut des Matériaux Jean Rouxel, UMR CNRS 6502, Laboratoire de Chimie des Solides, 2 rue de la Houssinière, BP 32229</s1>
<s2>44322 Nantes</s2>
<s3>FRA</s3>
<sZ>4 aut.</sZ>
</fA14>
<fA14 i1="04"><s1>Laboratoire de l'Etat Solide, Faculté des Sciences, Université de Sfax, Route de Sokra Km 4</s1>
<s2>3038 Sfax</s2>
<s3>TUN</s3>
<sZ>5 aut.</sZ>
</fA14>
<fA14 i1="05"><s1>Department of Physics, Kyushu Institute of Technology</s1>
<s2>Tobata-ku, Kitakyushu 804-8550</s2>
<s3>JPN</s3>
<sZ>6 aut.</sZ>
</fA14>
<fA14 i1="06"><s1>Laboratoire de Chimie de Coordination Organique, UMR 7140-CNRS, Université Louis Pasteur, 4 rue Blaise Pascal</s1>
<s2>67000 Strasbourg</s2>
<s3>FRA</s3>
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<fC01 i1="01" l="ENG"><s0>The structures (nuclear and magnetic), magnetic properties (2-300 K, 1-10<sup>4</sup>
 bar), and heat capacity of the layered ferromagnet Co<sub>5</sub>
(OH)<sub>6</sub>
(SO<sub>4</sub>
)<sub>2</sub>
(H<sub>2</sub>
O)<sub>4</sub>
 are reported. The crystal structure consists of brucite-like M<sup>II</sup>
-OH layers of edge-sharing octahedra, but having two different Co sites, which are pillared by ...O<sub>3</sub>
SO-Co(H<sub>2</sub>
O)<sub>4</sub>
-OSO<sub>3</sub>
.... The absorption spectrum confirms the presence of divalent Co, and by comparison of the two isotopic materials, the assignment of the vibrational spectra is proposed. The magnetic properties are those of a ferromagnet with a Curie temperature of 14 K. Temperature and field dependence magnetization data taken on an aligned sample suggest an easy-plane magnet. The Curie temperature increases linearly with pressure at a rate of +0.12 K/kbar, suggesting small progressive and uniform modifications of the Co-Co exchange interactions. Rietveld refinement of the neutron powder diffraction data and consideration of a group analysis reveal the direction of the moments of the Co within the layer to be along the b-axis, with a maximum moment of 3.33 μ<sub>B</sub>
 per cobalt. Those of the pillars remain random. Estimation of the entropy from the heat capacity data accounts for the presence of four ordered moments of Co with spin 1/2 at the long-range ordering temperature, while the moment of the pillaring Co contributes only at lower temperature due to the increase of the internal field as the temperature is lowered. The purely 2D-magnetic ordering in an easy-plane magnet, evidenced by neutron diffraction and heat capacity, challenges the existing theories and is a rare example of a single-layer magnet.</s0>
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<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA"><s0>Síntesis inorgánica</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE"><s0>Cobalt Complexe</s0>
<s1>FIN</s1>
<s2>NC</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG"><s0>Cobalt Complexes</s0>
<s1>FIN</s1>
<s2>NC</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA"><s0>Cobalto Complejo</s0>
<s1>FIN</s1>
<s2>NC</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE"><s0>Complexe polynucléaire</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG"><s0>Polynuclear complex</s0>
<s5>04</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA"><s0>Complejo polinuclear</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="X" l="FRE"><s0>Complexe aqua</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="X" l="ENG"><s0>Aqua complex</s0>
<s5>05</s5>
</fC03>
<fC03 i1="04" i2="X" l="SPA"><s0>Complejo aqua</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE"><s0>Complexe hydroxo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG"><s0>Hydroxo complex</s0>
<s5>06</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA"><s0>Complejo hidroxo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE"><s0>Complexe sulfato</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG"><s0>Sulfato complex</s0>
<s5>07</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA"><s0>Complejo sulfato</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE"><s0>Structure stratifiée</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG"><s0>Laminated structure</s0>
<s5>08</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA"><s0>Estructura estratificada</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE"><s0>Structure moléculaire</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG"><s0>Molecular structure</s0>
<s5>09</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA"><s0>Estructura molecular</s0>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE"><s0>Structure cristalline</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG"><s0>Crystalline structure</s0>
<s5>10</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA"><s0>Estructura cristalina</s0>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE"><s0>Propriété magnétique</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG"><s0>Magnetic properties</s0>
<s5>11</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA"><s0>Propiedad magnética</s0>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE"><s0>Anisotropie magnétique</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG"><s0>Magnetic anisotropy</s0>
<s5>12</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA"><s0>Anisotropía magnética</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE"><s0>Susceptibilité magnétique</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG"><s0>Magnetic susceptibility</s0>
<s5>13</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA"><s0>Susceptibilidad magnética</s0>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="3" l="FRE"><s0>Magnétomètre SQUID</s0>
<s5>14</s5>
</fC03>
<fC03 i1="13" i2="3" l="ENG"><s0>SQUID magnetometers</s0>
<s5>14</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE"><s0>Diffraction RX</s0>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG"><s0>X ray diffraction</s0>
<s5>15</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA"><s0>Difracción RX</s0>
<s5>15</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE"><s0>Deutérium Oxyde</s0>
<s4>INC</s4>
<s5>32</s5>
</fC03>
<fC03 i1="16" i2="X" l="FRE"><s0>6166F</s0>
<s2>PAC</s2>
<s4>INC</s4>
<s5>93</s5>
</fC03>
<fC07 i1="01" i2="X" l="FRE"><s0>Métal transition Complexe</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>02</s5>
</fC07>
<fC07 i1="01" i2="X" l="ENG"><s0>Transition metal Complexes</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>02</s5>
</fC07>
<fC07 i1="01" i2="X" l="SPA"><s0>Metal transición Complejo</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>02</s5>
</fC07>
<fN21><s1>317</s1>
</fN21>
<fN44 i1="01"><s1>PSI</s1>
</fN44>
<fN82><s1>PSI</s1>
</fN82>
</pA>
</standard>
</inist>
<affiliations><list><country><li>France</li>
<li>Japon</li>
<li>Tunisie</li>
</country>
<region><li>Alsace (région administrative)</li>
<li>Grand Est</li>
<li>Pays de la Loire</li>
<li>Île-de-France</li>
</region>
<settlement><li>Gif-sur-Yvette</li>
<li>Nantes</li>
<li>Strasbourg</li>
</settlement>
<orgName><li>Université Strasbourg 1</li>
</orgName>
</list>
<tree><country name="France"><region name="Grand Est"><name sortKey="Ben Salah, Mohsen" sort="Ben Salah, Mohsen" uniqKey="Ben Salah M" first="Mohsen" last="Ben Salah">Mohsen Ben Salah</name>
</region>
<name sortKey="Andre, Gilles" sort="Andre, Gilles" uniqKey="Andre G" first="Gilles" last="Andre">Gilles Andre</name>
<name sortKey="Kurmoo, Mohamedally" sort="Kurmoo, Mohamedally" uniqKey="Kurmoo M" first="Mohamedally" last="Kurmoo">Mohamedally Kurmoo</name>
<name sortKey="Richard Plouet, Mireille" sort="Richard Plouet, Mireille" uniqKey="Richard Plouet M" first="Mireille" last="Richard-Plouet">Mireille Richard-Plouet</name>
<name sortKey="Vilminot, Serge" sort="Vilminot, Serge" uniqKey="Vilminot S" first="Serge" last="Vilminot">Serge Vilminot</name>
</country>
<country name="Tunisie"><noRegion><name sortKey="Mhiri, Tahar" sort="Mhiri, Tahar" uniqKey="Mhiri T" first="Tahar" last="Mhiri">Tahar Mhiri</name>
</noRegion>
</country>
<country name="Japon"><noRegion><name sortKey="Takagi, Seishi" sort="Takagi, Seishi" uniqKey="Takagi S" first="Seishi" last="Takagi">Seishi Takagi</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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   |texte=   Nuclear and magnetic structures and magnetic properties of the layered cobalt hydroxysulfate Co5(OH)6(SO4)2(H2O)4 and its deuterated analogue, Co5(OD)6(SO4)2(D2O)4
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	Serveur d'exploration sur le cobalt au Maghreb
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Serveur d'exploration sur le cobalt au Maghreb

Nuclear and magnetic structures and magnetic properties of the layered cobalt hydroxysulfate Co5(OH)6(SO4)2(H2O)4 and its deuterated analogue, Co5(OD)6(SO4)2(D2O)4

Nuclear and magnetic structures and magnetic properties of the layered cobalt hydroxysulfate Co5(OH)6(SO4)2(H2O)4 and its deuterated analogue, Co5(OD)6(SO4)2(D2O)4

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