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And interpretation as an hexagonal a-site ...
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Document type :
Article dans une revue scientifique: Article original
DOI :
10.1021/acs.inorgchem.0c01387
PMID :
32876445
Permalink :
http://hdl.handle.net/20.500.12210/60545
Title :
And interpretation as an hexagonal a-site manganite
Author(s) :
Aguilar-Maldonado, Cintli [Auteur]
Arevalo-Lopez, Eugenia P. [Auteur]
Ritter, Clemens [Auteur]
Mentre, Olivier [Auteur] refId
Arevalo Lopez, Angel [Auteur]
Journal title :
INORGANIC CHEMISTRY
Abbreviated title :
Inorg Chem
Publication date :
2020-09-02
ISSN :
1520-510X
HAL domain(s) :
Chimie/Chimie inorganique
English abstract : [en]
Mn11Ta4O21 is presented as the first hexagonal A-site manganite. Based on simple rules, the structure is compatible with a 14H-layer (cchchch)2 stacking sequence that is related to BaVO3 and BaCrO3 high-pressure polymorphs. ...
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Mn11Ta4O21 is presented as the first hexagonal A-site manganite. Based on simple rules, the structure is compatible with a 14H-layer (cchchch)2 stacking sequence that is related to BaVO3 and BaCrO3 high-pressure polymorphs. The A-site overstoichiometry is explained through difference in ionic radii sizes between Ba and Mn. Magnetic properties show two transitions at TN1 = 88 K and TN2 = 56 K. Neutron powder diffraction evidence two magnetic structures with purely antiferromagnetic and ferrimagnetic orders below TN1 and TN2, respectively. A complementary description with 14H-(hhccccc)2 sequence of only Mn octahedra provides a direct comparison with BaMnO3-δ hexagonal perovskites and naturally explains the AFM order. Below TN2 a magneto-elastic coupling along with uniaxial negative thermal expansion are observed.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
  • Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Research team(s) :
Matériaux inorganiques, structures, systèmes et propriétés (MISSP)
Submission date :
2022-03-02T07:13:07Z
Université de Lille

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