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Nuclear resonant scattering from 193Ir as a probe of the electronic and magnetic properties of iridates

Alexeev, P; Leupold, O; Sergueev, I; Herlitschke, M; McMorrow, DF; Perry, RS; Hunter, EC; ... Wille, H-C; + view all (2019) Nuclear resonant scattering from 193Ir as a probe of the electronic and magnetic properties of iridates. Scientific Reports , 9 , Article 5097. 10.1038/s41598-019-41130-3. Green open access

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Abstract

The high brilliance of modern synchrotron radiation sources facilitates experiments with high-energy x-rays across a range of disciplines, including the study of the electronic and magnetic correlations using elastic and inelastic scattering techniques. Here we report on Nuclear Resonance Scattering at the 73 keV nuclear level in 193Ir. The transitions between the hyperfine split levels show an untypically high E2/M1 multi-polarity mixing ratio combined with an increased sensitivity to certain changes in the hyperfine field direction compared to non-mixing transitions. The method opens a new way for probing local magnetic and electronic properties of correlated materials containing iridium and provides novel insights into anisotropic magnetism in iridates. In particular, unexpected out-of-plane components of magnetic hyperfine fields and non-zero electric field gradients in Sr2IrO4 have been detected and attributed to the strong spin-orbit interaction in this iridate. Due to the high, 62% natural abundance of the 193Ir isotope, no isotopic enrichment of the samples is required, qualifying the method for a broad range of applications.

Type: Article
Title: Nuclear resonant scattering from 193Ir as a probe of the electronic and magnetic properties of iridates
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1038/s41598-019-41130-3
Publisher version: http://doi.org/10.1038/s41598-019-41130-3
Language: English
Additional information: Copyright © The Author(s) 2019, Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10071549
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