Synthesis, Nuclear, and Magnetic Structures and Magnetic Properties of [Mn3(OH)2(SO4)2(H2O)2]
Identifieur interne : 000963 ( Main/Exploration ); précédent : 000962; suivant : 000964Synthesis, Nuclear, and Magnetic Structures and Magnetic Properties of [Mn3(OH)2(SO4)2(H2O)2]
Auteurs : Mohsen Ben Salah [France, Tunisie] ; Serge Vilminot [France] ; Gilles André [France] ; Mireille Richard-Plouet [France] ; Françoise Bourée-Vigneron [France] ; Tahar Mhiri [Tunisie] ; Mohamedally Kurmoo [France]Source :
- Chemistry – A European Journal [ 0947-6539 ] ; 2004-04-19.
English descriptors
Abstract
[Mn3(OH)2(SO4)2(H2O)2] and its deuterated anlaogue were synthesized by a hydrothermal technique and characterized by differential thermal analysis, thermogravimetric analysis, and IR spectroscopy. Its nuclear structure, determined by single‐crystal X‐ray analysis and Rietveld analysis of neutron powder‐diffraction data, consists of a 3D network of chains of edge‐sharing Mn(1)O6, running along the c axis, connected by the apices of Mn(2)O6 and SO4 units. It is isostructural to the nickel analogue. Determination of the magnetic structure and measurements of magnetization and heat capacity indicate the coexistence of both magnetic long‐range ordering (LRO) and short‐range ordering (SRO) below a Néel temperature of 26 K, while the SRO is retained at higher temperatures. The moments of the two independent Mn atoms lie in the bc plane, and that of Mn(1) rotates continuously by 54° towards the c axis on decreasing the temperature from 25 to 1.4 K. While the SRO may be associated with frustration of the moments within a Mn3 trimer, the LRO is achieved by antiparallel alignment of the four symmetry‐related trimers within the magnetic unit cell. A spin‐flop field, measured by dc and ac magnetization on a SQUID, is observed at 15 kOe.
Url:
DOI: 10.1002/chem.200305645
Affiliations:
- France, Tunisie
- Alsace (région administrative), Grand Est, Pays de la Loire, Île-de-France
- Gif‐sur‐Yvette, Nantes, Strasbourg
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ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">[Mn3(OH)2(SO4)2(H2O)2] and its deuterated anlaogue were synthesized by a hydrothermal technique and characterized by differential thermal analysis, thermogravimetric analysis, and IR spectroscopy. Its nuclear structure, determined by single‐crystal X‐ray analysis and Rietveld analysis of neutron powder‐diffraction data, consists of a 3D network of chains of edge‐sharing Mn(1)O6, running along the c axis, connected by the apices of Mn(2)O6 and SO4 units. It is isostructural to the nickel analogue. Determination of the magnetic structure and measurements of magnetization and heat capacity indicate the coexistence of both magnetic long‐range ordering (LRO) and short‐range ordering (SRO) below a Néel temperature of 26 K, while the SRO is retained at higher temperatures. The moments of the two independent Mn atoms lie in the bc plane, and that of Mn(1) rotates continuously by 54° towards the c axis on decreasing the temperature from 25 to 1.4 K. While the SRO may be associated with frustration of the moments within a Mn3 trimer, the LRO is achieved by antiparallel alignment of the four symmetry‐related trimers within the magnetic unit cell. A spin‐flop field, measured by dc and ac magnetization on a SQUID, is observed at 15 kOe.</div></front></TEI><affiliations><list><country><li>France</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></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="André">Gilles André</name><name sortKey="Bouree Igneron, Francoise" sort="Bouree Igneron, Francoise" uniqKey="Bouree Igneron F" first="Françoise" last="Bourée-Vigneron">Françoise Bourée-Vigneron</name><name sortKey="Kurmoo, Mohamedally" sort="Kurmoo, Mohamedally" uniqKey="Kurmoo M" first="Mohamedally" last="Kurmoo">Mohamedally Kurmoo</name><name sortKey="Richard Louet, Mireille" sort="Richard Louet, Mireille" uniqKey="Richard Louet M" first="Mireille" last="Richard-Plouet">Mireille Richard-Plouet</name><name sortKey="Richard Louet, Mireille" sort="Richard Louet, Mireille" uniqKey="Richard Louet 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><name sortKey="Vilminot, Serge" sort="Vilminot, Serge" uniqKey="Vilminot S" first="Serge" last="Vilminot">Serge Vilminot</name></country><country name="Tunisie"><noRegion><name sortKey="Ben Salah, Mohsen" sort="Ben Salah, Mohsen" uniqKey="Ben Salah M" first="Mohsen" last="Ben Salah">Mohsen Ben Salah</name></noRegion><name sortKey="Mhiri, Tahar" sort="Mhiri, Tahar" uniqKey="Mhiri T" first="Tahar" last="Mhiri">Tahar Mhiri</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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