Structural characterization and magnetic properties of divanadates ZnMV2O7 (M = Co, Ni and Cu)
Identifieur interne : 000803 ( Main/Exploration ); précédent : 000802; suivant : 000804Structural characterization and magnetic properties of divanadates ZnMV2O7 (M = Co, Ni and Cu)
Auteurs : A. Ait Salah [Maroc] ; K. Benkhouja [Maroc] ; K. Jaafari [Maroc] ; J. Romero De Paz [Espagne] ; E. Climent [Espagne] ; R. Saez Puche [Espagne]Source :
- Journal of alloys and compounds [ 0925-8388 ] ; 2005.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Divanadates of general formula ZnMV2O7 (M = Co, Ni and Cu) have been prepared as powdered samples and the X-ray structural determination and magnetic studies have been carried out. Both ZnCoV2O7and ZnNiV2O7 crystallize with the so-called dichromate structure type, showing monoclinic symmetry, space group P21/c, while the third member of this family of vanadates ZnCuV2O7 shows the thortveitite structure type with monoclinic symmetry, space group C2/c. Magnetic susceptibility and specific heat measurements reveal that these derivatives behave as antiferromagnets and the estimated Néel temperatures are 4.5, 3.5 and 5.3 K for cobalt, nickel and copper vanadates, respectively. In all cases, the one-dimensional magnetic behavior that present the M2V2O7 vanadates is broken down when the magnetic cation M is half replaced by the diamagnetic Zn2+ to give the ZnMV2O7 samples studied in the present work.
Affiliations:
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Le document en format XML
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Structural characterization and magnetic properties of divanadates ZnMV<sub>2</sub>
O<sub>7</sub>
(M = Co, Ni and Cu)</title>
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<series><title level="j" type="main">Journal of alloys and compounds</title>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Antiferromagnetic materials</term>
<term>Chemical synthesis</term>
<term>Crystal structure</term>
<term>Magnetic properties</term>
<term>Magnetic susceptibility</term>
<term>Monoclinic lattices</term>
<term>Neel temperature</term>
<term>Specific heat</term>
<term>Vanadates</term>
<term>XRD</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Propriété magnétique</term>
<term>Structure cristalline</term>
<term>Susceptibilité magnétique</term>
<term>Chaleur massique</term>
<term>Point Néel</term>
<term>Synthèse chimique</term>
<term>Diffraction RX</term>
<term>Réseau monoclinique</term>
<term>Vanadate</term>
<term>Matériau antiferromagnétique</term>
<term>7550E</term>
<term>6166F</term>
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<front><div type="abstract" xml:lang="en">Divanadates of general formula ZnMV<sub>2</sub>
O<sub>7</sub>
(M = Co, Ni and Cu) have been prepared as powdered samples and the X-ray structural determination and magnetic studies have been carried out. Both ZnCoV<sub>2</sub>
O<sub>7</sub>
and ZnNiV<sub>2</sub>
O<sub>7</sub>
crystallize with the so-called dichromate structure type, showing monoclinic symmetry, space group P2<sub>1</sub>
/c, while the third member of this family of vanadates ZnCuV<sub>2</sub>
O<sub>7</sub>
shows the thortveitite structure type with monoclinic symmetry, space group C2/c. Magnetic susceptibility and specific heat measurements reveal that these derivatives behave as antiferromagnets and the estimated Néel temperatures are 4.5, 3.5 and 5.3 K for cobalt, nickel and copper vanadates, respectively. In all cases, the one-dimensional magnetic behavior that present the M<sub>2</sub>
V<sub>2</sub>
O<sub>7</sub>
vanadates is broken down when the magnetic cation M is half replaced by the diamagnetic Zn<sup>2+</sup>
to give the ZnMV<sub>2</sub>
O<sub>7</sub>
samples studied in the present work.</div>
</front>
</TEI>
<affiliations><list><country><li>Espagne</li>
<li>Maroc</li>
</country>
<region><li>Communauté de Madrid</li>
</region>
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<tree><country name="Maroc"><noRegion><name sortKey="Ait Salah, A" sort="Ait Salah, A" uniqKey="Ait Salah A" first="A." last="Ait Salah">A. Ait Salah</name>
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<name sortKey="Benkhouja, K" sort="Benkhouja, K" uniqKey="Benkhouja K" first="K." last="Benkhouja">K. Benkhouja</name>
<name sortKey="Jaafari, K" sort="Jaafari, K" uniqKey="Jaafari K" first="K." last="Jaafari">K. Jaafari</name>
</country>
<country name="Espagne"><region name="Communauté de Madrid"><name sortKey="Romero De Paz, J" sort="Romero De Paz, J" uniqKey="Romero De Paz J" first="J." last="Romero De Paz">J. Romero De Paz</name>
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<name sortKey="Climent, E" sort="Climent, E" uniqKey="Climent E" first="E." last="Climent">E. Climent</name>
<name sortKey="Saez Puche, R" sort="Saez Puche, R" uniqKey="Saez Puche R" first="R." last="Saez Puche">R. Saez Puche</name>
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