Universität zu Köln

Yang, Lin ORCID: 0000-0001-5175-8629, Jin, Lei ORCID: 0000-0001-6924-2364, Wysocki, Lena ORCID: 0000-0002-7540-2683, Schoepf, Joerg, Jansen, Daniel, Das, Brajagopal, Kornblum, Lior ORCID: 0000-0001-6305-7619, Van Loosdrecht, Paul H. M. and Lindfors-Vrejoiu, Ionela (2021). Enhancing the ferromagnetic interlayer coupling between epitaxial SrRuO3 layers. Phys. Rev. B, 104 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

Magnetic interlayer coupling is a key ingredient in designing magnetic multilayers with functionalities that reach out to the realm of applications. In epitaxial ferromagnetic (FM) oxide multilayers, the magnetic interlayer coupling is, however, less studied and its prediction is often a challenging task. Ultrathin FM SrRuO3 epitaxial films with perpendicular magnetic anisotropy, interfaced with suitable oxides, may be susceptible of forming skyrmions. Hence, a strong FM interlayer coupling would be beneficial to achieve uniform switching behavior of a SrRuO3-based multilayer. Previous studies reported that the coupling of two SrRuO3 layers separated by a non-FM oxide spacer is at best weakly FM and the two FM layers switch at markedly different fields. Here we study the magnetic interlayer coupling between two FM SrRuO3 layers separated by ultrathin LaNiO3 in epitaxial heterostructures grown on SrTiO3(100) single crystals. We found that FM SrRuO3 layers separated by 2 monolayers (MLs) thick LaNiO3 show weak FM interlayer coupling of about 106 mu J/m(2) at 10 K. The coupling becomes strongly FMfor four MLs thick (about 1.6 nm) LaNiO3 spacers and the two SrRuO3 layers reverse their magnetization at a common value of the perpendicular magnetic field. This is likely due to a transition of the LaNiO3 spacer from insulating to metallic, as its thickness increases.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Yang, Lin UNSPECIFIED orcid.org/0000-0001-5175-8629 UNSPECIFIED Jin, Lei UNSPECIFIED orcid.org/0000-0001-6924-2364 UNSPECIFIED Wysocki, Lena UNSPECIFIED orcid.org/0000-0002-7540-2683 UNSPECIFIED Schoepf, Joerg UNSPECIFIED UNSPECIFIED UNSPECIFIED Jansen, Daniel UNSPECIFIED UNSPECIFIED UNSPECIFIED Das, Brajagopal UNSPECIFIED UNSPECIFIED UNSPECIFIED Kornblum, Lior UNSPECIFIED orcid.org/0000-0001-6305-7619 UNSPECIFIED Van Loosdrecht, Paul H. M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lindfors-Vrejoiu, Ionela UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-584179
DOI:	10.1103/PhysRevB.104.064444
Journal or Publication Title:	Phys. Rev. B
Volume:	104
Number:	6
Date:	2021
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language LOOPS Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/58417