Magnetism of Ir5+ - based double perovskites: Unraveling its nature and the influence of structure

Laguna-Marco, MA (Universidad de Zaragoza) ; Arias-Egido, E ; Piquer, C (Universidad de Zaragoza) ; Cuartero, V ; Hernandez-Lopez, L ; Kayser, P ; Alonso, JA ; Barker, JAT ; Fabbris, G ; Escanhoela, CA ; Irifune, T

Resumen: A combination of x-ray-diffraction, x-ray absorption, x-ray magnetic circular dichroism, macroscopic magnetization, and muon-spin relaxation measurements is used to investigate the interplay between structure (both crystallography and microstructure) and magnetism in Sr-2 YIrO6 as a function of both chemical (Ca-doping) and physical (hydrostatic) pressure. X-ray absorption spectroscopy clearly shows that the physical pressure is more effective in modifying the structure. On the other hand, the dichroic measurements evidence a constant magnetic signal with physical pressure and strong differences with Ca-doping. Muon-spin relaxation reveals the presence of magnetic order, even when this is hidden in the magnetization data. From the combined analysis, the magnetic results are explained in terms of the presence of Ir6+ or Ir4+ ions in magnetic clusters, most likely located at and triggered by antisite disorder. The measurements under high physical pressure indicate that the magnetic state is independent of the crystallographic details such as Ir-O distances and Ir-O-Y angles.

Idioma: Inglés

DOI: 10.1103/PhysRevB.101.014449

Año: 2020

Publicado en: Physical Review B 101, 1 (2020), 014449 [11 pp]
ISSN: 2469-9950

Factor impacto JCR: 4.036 (2020)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 130 / 333 = 0.39 (2020) - Q2 - T2
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 22 / 69 = 0.319 (2020) - Q2 - T1
Categ. JCR: PHYSICS, APPLIED rank: 41 / 160 = 0.256 (2020) - Q2 - T1

Factor impacto SCIMAGO: 1.78 - Electronic, Optical and Magnetic Materials (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO-FSE/FPI -2015
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-54425-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-83468-R

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)