title: Interlayer coupling through a dimensionality-induced magnetic state.
abstract: Dimensionality is known to play an important role in many compounds for which ultrathin layers can behave very differently from the bulk. This is especially true for the paramagnetic metal LaNiO3, which can become insulating and magnetic when only a few monolayers thick. We show here that an induced antiferromagnetic order can be stabilized in the [111] direction by interfacial coupling to the insulating ferromagnet LaMnO3, and used to generate interlayer magnetic coupling of a nature that depends on the exact number of LaNiO3 monolayers. For 7-monolayer-thick LaNiO3/LaMnO3 superlattices, negative and positive exchange bias, as well as antiferromagnetic interlayer coupling are observed in different temperature windows. All three behaviours are explained based on the emergence of a (¼,¼,¼)-wavevector antiferromagnetic structure in LaNiO3 and the presence of interface asymmetry with LaMnO3. This dimensionality-induced magnetic order can be used to tailor a broad range of magnetic properties in well-designed superlattice-based devices.
authors.affiliation: Département de Physique de la Matière Quantique, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
authors.forename: M
authors.initials: M
authors.lastname: Gibert
authors.affiliation: Département de Physique de la Matière Quantique, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.|Service de Physique de l'Etat Condensé, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette, France.
authors.forename: M
authors.initials: M
authors.lastname: Viret
authors.affiliation: London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London WC1H 0AH, UK.|Department of Physics and Astronomy, University College London, Gower Street, London WC1H 6BT, UK.
authors.forename: P
authors.initials: P
authors.lastname: Zubko
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette, France.
authors.forename: N
authors.initials: N
authors.lastname: Jaouen
authors.affiliation: Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042 Grenoble, France.
authors.forename: J-M
authors.initials: JM
authors.lastname: Tonnerre
authors.affiliation: Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS-UMR 8502, F-91405 Orsay, France.|Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense (UCM), CEI Moncloa, 28040 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Torres-Pardo
authors.affiliation: Département de Physique de la Matière Quantique, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
authors.forename: S
authors.initials: S
authors.lastname: Catalano
authors.affiliation: Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS-UMR 8502, F-91405 Orsay, France.
authors.forename: A
authors.initials: A
authors.lastname: Gloter
authors.affiliation: Laboratoire de Physique des Solides, Université Paris-Saclay, CNRS-UMR 8502, F-91405 Orsay, France.
authors.forename: O
authors.initials: O
authors.lastname: Stéphan
authors.affiliation: Département de Physique de la Matière Quantique, University of Geneva, 24 Quai Ernest-Ansermet, 1211 Genève 4, Switzerland.
authors.forename: J-M
authors.initials: JM
authors.lastname: Triscone