Title :

A comprehensive study of magnetic exchanges in the layered oxychalcogenides Sr3Fe2O5Cu2Q2 (Q = S, Se)

Author(s) :

Lü, Minfeng [Auteur]
Mentre, Olivier [Auteur]
Gordon, Elijah E. [Auteur]
Whangbo, Myung-Hwan [Auteur]
Wattiaux, Alain [Auteur]
Duttine, Mathieu [Auteur]
Tiercelin, Nicolas [Auteur]
Kabbour, Houria [Auteur]
Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]

Journal title :

Journal of Magnetism and Magnetic Materials

Pages :

147-153

Publisher :

Elsevier

Publication date :

2017

ISSN :

0304-8853

English keyword(s) :

Layered oxychalcogenides
Antiferromagnetism
Mössbauer
Neutron diffraction
Magnetic structure

HAL domain(s) :

Chimie/Chimie inorganique

English abstract : [en]

The layered oxysulfide Sr3Fe2O5Cu2S2 was prepared, and its crystal structure and magnetic properties were characterized by synchrotron X-ray diffraction (XRD), powder neutron diffraction (PND), Mössbauer spectroscopy ...
Show more >The layered oxysulfide Sr3Fe2O5Cu2S2 was prepared, and its crystal structure and magnetic properties were characterized by synchrotron X-ray diffraction (XRD), powder neutron diffraction (PND), Mössbauer spectroscopy measurements and by density functional theory (DFT) calculations. In addition, the spin exchange interactions leading to the ordered magnetic structure of Sr3Fe2O5Cu2S2 were compared with those of its selenium analogue Sr3Fe2O5Cu2Se2. The oxysulfide Sr3Fe2O5Cu2S2 adopts a G-type antiferromagnetic (AFM) structure at a temperature in the range 485–512 K, which is comparable with the three-dimensional (3D) AFM ordering temperature, TN ≈ 490 K, found for Sr3Fe2O5Cu2Se2. Consistent with this observation, the spin exchange interactions of the magnetic (Sr3Fe2O5)2+ layers are slightly greater (but comparable) for oxysulfide than for the oxyselenide. Attempts to reduce or oxidize Sr3Fe2O5Cu2S2 using topochemical routes yield metallic Fe.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

ANR Project :

Anion Blended Materials Conception

Administrative institution(s) :

ISEN
Univ. Valenciennes
ENSCL
CNRS
Institut Catholique Lille
Centrale Lille
Univ. Artois
Université de Lille

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520
• Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181

Research team(s) :

Matériaux inorganiques, structures, systèmes et propriétés (MISSP)

Submission date :

2019-09-25T14:06:00Z