Chains
Document type :
Article dans une revue scientifique: Article original
PMID :
Permalink :
Title :
Chains
Author(s) :
Leclercq, Bastien [Auteur]
Kabbour, Houria [Auteur]
Damay, Francoise [Auteur]
Colin, Claire V. [Auteur]
Pautrat, Alain [Auteur]
Arevalo Lopez, Angel [Auteur]
Mentre, Olivier [Auteur]
Kabbour, Houria [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Damay, Francoise [Auteur]
Colin, Claire V. [Auteur]
Pautrat, Alain [Auteur]
Arevalo Lopez, Angel [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Mentre, Olivier [Auteur]
![refId](/themes/Mirage2//images/idref.png)
Journal title :
INORGANIC CHEMISTRY
Abbreviated title :
Inorg Chem
Publication date :
2019-09-10
ISSN :
1520-510X
HAL domain(s) :
Chimie/Chimie inorganique
English abstract : [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 ...
Show more >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.Show less >
Show more >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.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
CNRS
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Centrale Lille
ENSCL
Univ. Artois
Université de Lille
Collections :
Research team(s) :
Matériaux inorganiques, structures, systèmes et propriétés (MISSP)
Submission date :
2022-03-02T07:13:12Z