Controlled lateral anisotropy in correlated manganite heterostructures by interface-engineered oxygen octahedral coupling

Zhaoliang Liao, Mark Huijben, Z. Zhong, N. Gauquelin, S. Macke, R.J. Green, S. van Aert, J. Verbeeck, G. van Tendeloo, K. Held, G.A. Sawatzky, Gertjan Koster, Augustinus J.H.M. Rijnders

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Abstract

Controlled in-plane rotation of the magnetic easy axis in manganite heterostructures by tailoring the interface oxygen network could allow the development of correlated oxide-based magnetic tunnelling junctions with non-collinear magnetization, with possible practical applications as miniaturized high-switching-speed magnetic random access memory (MRAM) devices. Here, we demonstrate how to manipulate magnetic and electronic anisotropic properties in manganite heterostructures by engineering the oxygen network on the unit-cell level. The strong oxygen octahedral coupling is found to transfer the octahedral rotation, present in the NdGaO3 (NGO) substrate, to the La2/3Sr1/3MnO3 (LSMO) film in the interface region. This causes an unexpected realignment of the magnetic easy axis along the short axis of the LSMO unit cell as well as the presence of a giant anisotropic transport in these ultrathin LSMO films. As a result we possess control of the lateral magnetic and electronic anisotropies by atomic-scale design of the oxygen octahedral rotation
Original languageEnglish
Pages (from-to)425-431
Number of pages8
JournalNature materials
Volume15
DOIs
Publication statusPublished - 2016

Keywords

  • 2023 OA procedure

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