Chains

Leclercq, Bastien; Kabbour, Houria; Damay, Francoise; Colin, Claire V.; Pautrat, Alain; Arevalo Lopez, Angel; Mentre, Olivier

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1021/acs.inorgchem.9b01303

PMID :

31503469

URL permanente :

http://hdl.handle.net/20.500.12210/60561

Titre :

Chains

Auteur(s) :

Leclercq, Bastien [Auteur]
Kabbour, Houria [Auteur]

Damay, Francoise [Auteur]
Colin, Claire V. [Auteur]
Pautrat, Alain [Auteur]
Arevalo Lopez, Angel [Auteur]

Mentre, Olivier [Auteur]

Titre de la revue :

INORGANIC CHEMISTRY

Nom court de la revue :

Inorg Chem

Date de publication :

2019-09-10

ISSN :

1520-510X

Discipline(s) HAL :

Chimie/Chimie inorganique

Résumé en anglais : [en]

We have investigated two original hydrated cobalt arsenates based on Co2+ octahedral edge-sharing chains. Their different magnetocrystalline anisotropies induce different types of metamagnetic transitions: spin-flop versus ...
Lire la suite >We have investigated two original hydrated cobalt arsenates based on Co2+ octahedral edge-sharing chains. Their different magnetocrystalline anisotropies induce different types of metamagnetic transitions: spin-flop versus spin-flip. In both compounds, a strong local anisotropy (Ising spins) is favored by the spin-orbit coupling present in the CoO6 octahedra, while ferromagnetic (FM) exchanges predominate in the chains. Co2(As2O7)·2H2O (1) orders antiferromagnetically below TN = 6.7 K. The magnetic structure is a noncollinear antiferromagnetic spin arrangement along the zigzag chains with DFT calculations implying frustrated chains and weakened anisotropy. A metamagnetic transition suggests a spin-flop process above μ0H = 3.2 T. In contrast, in BaCo2As2O8·2H2O (2) linear chains are arranged in disconnected layers, with only interchain ferromagnetic exchanges, therefore increasing its magnetocrystalline anisotropy. The magnetic structure is collinear with a magnetic easy axis that allows a spin-flop to a sharp spin-flip transition below TN = 15.1 K and above μ0H = 6.2 T.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille

Collections :

Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Équipe(s) de recherche :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Date de dépôt :

2022-03-02T07:13:12Z

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