Interfacial Origin of the Magnetisation Suppression of Thin Film Yttrium Iron Garnet

Abstract

Yttrium iron garnet has a very high Verdet constant, is transparent in the infrared and is an insulating ferrimagnet leading to its use in optical and magneto-optical applications. Its high Q-factor has been exploited to make resonators and filters in microwave devices, but it also has the lowest magnetic damping of any known material. In this article we describe the structural and magnetic properties of single crystal thin-film YIG where the temperature dependence of the magnetisation reveals a decrease in the low temperature region. In order to understand this complex material we bring a large number of structural and magnetic techniques to bear on the same samples. Through a comprehensive analysis we show that at the substrate -YIG interface, an interdiffusion zone of only 4 - 6nm exists. Due to the interdiffusion of Y from the YIG and Gd from the substrate, an addition magnetic layer is formed at the interface whose properties are crucially important in samples with a thickness of YIG less than 200nm.

Metadata

Item Type:	Article
Authors/Creators:	Mitra, A Cespedes, O https://orcid.org/0000-0002-5249-9523 Ramasse, Q https://orcid.org/0000-0001-7466-2283 Ali, M https://orcid.org/0000-0002-7426-7731 Marmion, S Ward, M Brydson, RMD https://orcid.org/0000-0003-2003-7612 Kinane, CJ https://orcid.org/0000-0002-1185-0719 Cooper, JFK https://orcid.org/0000-0002-4635-2381 Langridge, S https://orcid.org/0000-0003-1104-0772 Hickey, BJ https://orcid.org/0000-0001-8289-5618
Copyright, Publisher and Additional Information:	© The Author(s) 2017 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. The 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/
Dates:	Accepted: 18 July 2017 Published: 18 September 2017
Institution:	The University of Leeds
Academic Units:	The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Condensed Matter (Leeds)
Funding Information:	Funder Grant number EPSRC EP/M000923/1 EPSRC GR/S41043/01 EPSRC 01STM01309011 EU - European Union 316657 EPSRC EP/J021156/1 EPSRC Not Known
Depositing User:	Symplectic Publications
Date Deposited:	01 Sep 2017 09:07
Last Modified:	16 Dec 2024 10:30
Status:	Published
Publisher:	Nature Publishing Group
Identification Number:	10.1038/s41598-017-10281-6
Related URLs:	Dataset
Open Archives Initiative ID (OAI ID):	oai:eprints.whiterose.ac.uk:120702