Ferromagnetic spin-orbit coupling in the Ba 2 SbSmO 6 perovskite-like insulator
- PDF / 2,056,199 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 32 Downloads / 200 Views
Ferromagnetic spin-orbit coupling in the Ba2SbSmO6 perovskite-like insulator J. A. Grisales Cero´n1, D. A. Landı´nez Te´llez1,2, J. Arbey Rodrı´guez Martı´nez1,2, A. Rosales-Rivera3, and J. Roa-Rojas1,* 1
Grupo de Física de Nuevos Materiales, Departamento de Física, Universidad Nacional de Colombia, Bogotá, DC 11001, Colombia Grupo de Estudios de Materiales GEMA, Departamento de Física, Universidad Nacional de Colombia, Bogotá, DC 11001, Colombia 3 Laboratorio de Magnetismo y Materiales Avanzados, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia Sede Manizales, Manizales, Colombia 2
Received: 8 July 2020
ABSTRACT
Revised: 25 August 2020
In search of unconventional ferromagnetic mechanisms in perovskite-like materials, the synthesis process, crystal structure, surface morphology, composition, and optical and magnetic behaviors of the narrowly studied rare-earth antimoniate Ba2SbSmO6, as well as its electronic structure calculated using the density functional theory, are reported in the present. Samples were synthesized by means of the solid-state reaction method. The structural analysis of the obtained compound was performed by Rietveld refinement of the experimental X-ray diffraction experimental data, which revealed its crystallization in a cubic complex perovskite, belonging to the space group Fm 3 m (#225) with lattice ˚ . Surface morphological studies revealed the polyparameter a = 8.5085(5) A
Accepted: 29 August 2020
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
crystalline character of the material, with inhomogeneous granular microstructure and nanometric average size. The measured composition is close to that expected from the stoichiometry of the material. Temperature-dependent magnetic susceptibility measurements exhibited magnetic anisotropy effects and magnetization hysteresis curves showed weak ferromagnetic response for the examined temperature values. The electronic structure was calculated by means linearized augmented plane waves (FP-LAPW) in the framework of the density functional theory (DFT). Curves of density of states as a function of the wave number revealed the insulator behavior of the Ba2SbSmO6 material. The weak ferromagnetism exhibited by this perovskite-like compound is attributed to the occurrence of spin-orbit interaction effects of the 4f-Sm3? electrons hybridized with 2p–O2- orbitals.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10854-020-04385-5
J Mater Sci: Mater Electron
1 Introduction In recent years, ceramic materials have been extensively investigated due to the appearance of various physical and chemical properties that previously seemed reserved only for metallic solids. Among these, a singular family of materials known as perovskites has attracted great attention because their chemical composition and structural nature allow them to introduce stoichiometric modifications, producing substantial changes in the microscopic and macroscopic physical properties of the resulting materi
Data Loading...
