Strain dependence of antiferromagnetic interface coupling in La0.7Sr0.3MnO3/SrRuO3 superlattices

Das, Sujit; Herklotz, Andreas; Pippel, Eckhard; Guo, Erjia; Rata, Diana; Doerr, Kathrin

doi:10.1103/PhysRevB.91.134405

Strain dependence of antiferromagnetic interface coupling in La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices

Journal Article · Mon Apr 06 00:00:00 EDT 2015 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.91.134405· OSTI ID:1360035

Das, Sujit ^[1]; Herklotz, Andreas ^[2]; Pippel, Eckhard ^[3]; Guo, Erjia ^[4]; Rata, Diana ^[1]; Doerr, Kathrin ^[5]

Martin-Luther Univ., Halle-Wittenberg (Germany); IFW, Dresden (Germany)
Martin-Luther Univ., Halle-Wittenberg (Germany); IFW, Dresden (Germany); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Max Planck Inst. for Microstructure Physics, Halle (Germany)
Martin-Luther Univ., Halle-Wittenberg (Germany); IFW, Dresden (Germany); Johannes Gutenberg Univ., Mainz (Germany)
Martin-Luther University Halle-Wittenberg, Germany; Martin-Luther Univ., Halle-Wittenberg (Germany); IFW, Dresden (Germany)

We have investigated the magnetic response of La_0.7Sr_0.3MnO₃/SrRuO₃ superlattices to biaxial in-plane strain applied in situ. Superlattices grown on piezoelectric substrates of 0.72PbMg_1/3Nb_2/3O₃-0.28PbTiO₃(001) (PMN-PT) show strong antiferromagnetic coupling of the two ferromagnetic components. The coupling field of mu H-0(AF) = 1.8 T is found to change by mu(0)Delta H-AF/Delta epsilon similar to -520 mT %(-1) under reversible biaxial strain Delta epsilon at 80 K in a [La_0.7Sr_0.3MnO₃(22 angstrom)/SrRuO₃(55 angstrom)]₁₅ superlattice. This reveals a significant strain effect on interfacial coupling. The applied in-plane compression enhances the ferromagnetic order in the manganite layers, which are under as-grown tensile strain, leading to a larger net coupling of SrRuO₃ layers at the interface. It is thus difficult to disentangle the contributions from strain-dependent antiferromagnetic Mn-O-Ru interface coupling and Mn-O-Mn ferromagnetic double exchange near the interface for the strength of the apparent antiferromagnetic coupling. We discuss our results in the framework of available models.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1360035

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 13 Vol. 91; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (5)

Thickness‐Dependent Ru Exchange Spring at La _0.7 Sr _0.3 MnO ₃ –SrRuO ₃ Interface Koch, Martin M.; Bergmann, Lukas; Agrestini, Stefano physica status solidi (b), Vol. 257, Issue 7 https://doi.org/10.1002/pssb.201900616	journal	February 2020
Finite-size scaling and exchange-bias in SrRuO ₃ /LaNiO ₃ /SrRuO ₃ trilayers Thota, S.; Ghosh, S.; Nayak, S. Journal of Applied Physics, Vol. 122, Issue 12 https://doi.org/10.1063/1.5004130	journal	September 2017
Structural and magnetic properties of La0.7Sr0.3MnO3/LaCoO3 heterostructures Thota, S.; Roychowdhury, K.; Thakare, V. Applied Physics Letters, Vol. 113, Issue 12 https://doi.org/10.1063/1.5045359	journal	September 2018
Interfacial magnetism in La _0.7 Sr _0.3 MnO ₃ /LaNiO ₃ ultrathin superlattices Das, Sujit; Ghosh, Sayandeep; Pramanik, Prativa Journal of Physics D: Applied Physics, Vol. 51, Issue 32 https://doi.org/10.1088/1361-6463/aacfd4	journal	July 2018
Low-field switching of noncollinear spin texture at L a 0.7 S r 0.3 Mn O 3 − SrRu O 3 interfaces Das, S.; Rata, A. D.; Maznichenko, I. V. Physical Review B, Vol. 99, Issue 2 https://doi.org/10.1103/physrevb.99.024416	journal	January 2019

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