Dresden 2017 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 36: Postersession I
DS 36.15: Poster
Mittwoch, 22. März 2017, 17:00–19:00, P2-EG
Ruddlesden-Popper interface in correlated manganite heterostructures induces magnetic decoupling and dead layer reduction — Alexandr Belenchuk1, Oleg Shapoval1, Vladimir Roddatis2, •Vitaly Bruchmann-Bamberg3, Konrad Samwer3, and Vasily Moshnyaga3 — 1IIEN, Academy of Sciences of Moldova, str. Academiei 3/3, MD-2028 Kishinev, Republic of Moldova — 2Institut für Materialphysik, Georg-August-Universität-Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen — 3I. Physikalisches Institut, Georg-August-Universität-Göttingen, Friedrich-Hund-Platz 1, 37077 Göttingen
We report on the interface engineering in correlated manganite heterostructures using embedded stacks of atomic layers that form the Ruddlesden-Popper structure. A room temperature magnetic decoupling was achieved through insertion of (SrO)2–TiO2–(SrO)2 sequence of atomic layers at the interface between ferromagnetic metallic La0.7Sr0.3MnO3 and (La0.7Sr0.3)(Mn0.9Ru0.1)O3 films. Moreover, the narrowing of interfacial dead layer in ultrathin La0.7Sr0.3MnO3 films was demonstrated by deposition of a single (SrO)2 rock-salt layer at the interface with SrTiO3 (100) substrate.
The obtained results are discussed basing on the symmetry breaking and disconnection of the MnO6 octahedra network at the interface that may lead to the improved performance of all-oxide magnetic tunnel junctions. We suggest that octahedral decoupling realized by formation of Ruddlesden-Popper interfaces is an effective structural mechanism to control functionalities of correlated perovskite heterostructures.