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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Laguna-Marco, M. A. [1, 2] ; Arias-Egido, E. [1, 2] ; Piquer, C. [1, 2] ; Cuartero, V [3, 4] ; Hernandez-Lopez, L. [1, 2] ; Kayser, P. [5] ; Alonso, J. A. [5] ; Barker, J. A. T. [6] ; Fabbris, G. [7] ; Escanhoela Jr, C. A. ; Irifune, T. [8, 9]
Total Authors: 11
[1] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza - Spain
[2] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza - Spain
[3] European Radiat Synchrotron Facil, F-38043 Grenoble - France
[4] Ctr Univ Def Zaragoza, Ctra Huesca S-N, Zaragoza 50090 - Spain
[5] CSIC, Inst Ciencia Mat Madrid, E-28049 Madrid - Spain
[6] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen - Switzerland
[7] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 - USA
[8] Ehime Univ, 2-5 Bunkyo Cho, Matsuyama, Ehime 7908577 - Japan
[9] Tokyo Inst Technol, Earth Life Sci Inst, Tokyo 1528500 - Japan
Total Affiliations: 9
Document type: Journal article
Source: Physical Review B; v. 101, n. 1 JAN 30 2020.
Web of Science Citations: 0

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. (AU)

FAPESP's process: 16/24137-3 - Orbital magnetism in double perovskite compounds under extreme conditions by synchrotron radiation techniques
Grantee:Carlos Augusto Escanhoela Júnior
Support type: Scholarships abroad - Research Internship - Post-doctor