Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Poster II
MA 55.106: Poster
Freitag, 4. April 2014, 10:30–13:30, P2
Influence of shuttered growth vs. co-deposition on magnetic depth profile of [La2/3Sr1/3]n±1[Mn]n[O]3n±1/SrTiO3 — •Alexandra Steffen1, Sabine Pütter1, Jürgen Schubert3, Willi Zander3, Stefan Mattauch1, and Thomas Brückel1,2 — 1Jülich Centre for Neutron Science JCNS, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstr. 1, 85748 Garching — 2Jülich Centre for Neutron Science JCNS and Peter Grünberg Institut PGI, JCNS-2, PGI-4: Scattering Methods, Forschungszentrum Jülich GmbH, 52425 Jülich — 3Peter Grünberg Institut PGI, PGI-9: Semiconductor Nanoelectronics, Forschungszentrum Jülich GmbH, 52425 Jülich
In transition metal oxide thin films the precise control of stoichiometry can explain phenomena like ferromagnetism or superconductivity at interfaces, e.g. LaAlO3/SrTiO3 [1]. Here, we grew [La2/3Sr1/3]n±1[Mn]n[O]3n±1 layers on SrTiO3 by Oxide Molecular Beam Epitaxy. In our study we compared the influence of deposition methods, co-deposition and shuttered growth on the magnetic depth profile of different [La2/3Sr1/3] to Mn ratios. During growth, RHEED oscillations [2] were constantly monitored to observe the structural quality. The samples were characterized structurally (LEED, XRR, XRD) and magnetically (SQUID). The stoichiometry was further checked via RBS. The relation of different deposition methods and depth-dependent distribution of magnetic moments was achieved via Polarized Neutron Reflectometry at TREFF@MLZ.
[1] M. Warusawithana et al., Nat. Commun. 4, 2351 (2013)
[2] J. Neave and B. Joyce, Appl. Phys. A 31, 1 (1983)