Universität zu Köln

Zhang, Xuanyi ORCID: 0000-0002-2027-0476, Penn, Aubrey N., Wysocki, Lena ORCID: 0000-0002-7540-2683, Zhang, Zhan, van Loosdrecht, Paul H. M., Kornblum, Lior ORCID: 0000-0001-6305-7619, LeBeau, James M., Lindfors-Vrejoiu, Ionela and Kumah, Divine P. (2022). Thickness and temperature dependence of the atomic-scale structure of SrRuO3 thin films. APL Mater., 10 (5). MELVILLE: AIP Publishing. ISSN 2166-532X

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Abstract

The temperature-dependent layer-resolved structure of 3 to 44 unit cell thick SrRuO3 (SRO) films grown on Nb-doped SrTiO3 substrates is investigated using a combination of high-resolution synchrotron x-ray diffraction and high-resolution electron microscopy to understand the role that structural distortions play in suppressing ferromagnetism in ultra-thin SRO films. The oxygen octahedral tilts and rotations and Sr displacements characteristic of the bulk orthorhombic phase are found to be strongly dependent on temperature, the film thickness, and the distance away from the film-substrate interface. For thicknesses, t, above the critical thickness for ferromagnetism (t > 3 uc), the orthorhombic distortions decrease with increasing temperature above T-C. Below T-C, the structure of the films remains constant due to the magneto-structural coupling observed in bulk SRO. The orthorhombic distortions are found to be suppressed in the 2-3 interfacial layers due to structural coupling with the SrTiO3 substrate and correlate with the critical thickness for ferromagnetism in uncapped SRO films. (C) 2022 Author(s).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zhang, Xuanyi UNSPECIFIED orcid.org/0000-0002-2027-0476 UNSPECIFIED Penn, Aubrey N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wysocki, Lena UNSPECIFIED orcid.org/0000-0002-7540-2683 UNSPECIFIED Zhang, Zhan UNSPECIFIED UNSPECIFIED UNSPECIFIED van Loosdrecht, Paul H. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kornblum, Lior UNSPECIFIED orcid.org/0000-0001-6305-7619 UNSPECIFIED LeBeau, James M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors-Vrejoiu, Ionela UNSPECIFIED UNSPECIFIED UNSPECIFIED Kumah, Divine P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-684158
DOI:	10.1063/5.0087791
Journal or Publication Title:	APL Mater.
Volume:	10
Number:	5
Date:	2022
Publisher:	AIP Publishing
Place of Publication:	MELVILLE
ISSN:	2166-532X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSPORT; MAGNETISM Multiple languages Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68415