Structure distortion and magnetism in double perovskites Ca{sub 2-x}La{sub x}FeReO{sub 6} (0{<=}x{<=}0.8)

Journal Article · Wed Dec 15 00:00:00 EST 2010 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2010.09.032· OSTI ID:21494150

Lue, Minfeng ^[1]; Li, Junjie ^[2]; Zou, Heng ^[3]; Wu, Zhijian ^[1]; Meng, Jian ^[1]

---

1. State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022 (China)
2. Jilin Province Petrochemical Engineering Institute, Changchun 130021 (China)
3. Jilin TV and Radio University, No. 6815 Renmin St., Changchun 130022 (China)

The crystal structure and magnetism of Ca{sub 2-x}La{sub x}FeReO{sub 6} (0{<=}x{<=}0.8) double perovskites have been investigated. The samples with low doping (x{<=}0.4) are found to crystallize with the monoclinic P2{sub 1}/n superstructure, while those in the high doping ones (x{>=}0.6) have orthorhombic Pbnm superstructure. With the increase of an La doping, the anti-site defects increases, giving rise to highly disordered samples at the Fe and Re positions. At the low doping region (x{<=}0.4), the compounds undergo a simultaneous structural and magnetic transition accompanying a slight increase of the Curie temperature. The increase of Curie temperature is discussed in terms of the structural change with doping. -- Graphical abstract: The crystal structures of Ca{sub 2-x}La{sub x}FeReO{sub 6} transform from monoclinic to orthorhombic; meanwhile, high degree of anti-site disorder was present at B/B' position, which promotes AFM correlations as an La increases. Display Omitted

• OSTI ID: 21494150
• Journal Information: Journal of Solid State Chemistry, Vol. 183, Issue 12; Other Information: DOI: 10.1016/j.jssc.2010.09.032; PII: S0022-4596(10)00431-7; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC FORCE MICROSCOPY
CALCIUM COMPOUNDS
CURIE POINT
IRON COMPOUNDS
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETISM
MONOCLINIC LATTICES
ORTHORHOMBIC LATTICES
PEROVSKITES
RHENATES
X-RAY DIFFRACTION
ALKALINE EARTH METAL COMPOUNDS
COHERENT SCATTERING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
DIFFRACTION
MICROSCOPY
MINERALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE