This title appears in the Scientific Report :
2018
Thin film fabrication by molecular beam epitaxyat the Jülich Centre for Neutron Science at Heinz Mayer-Leibnitz Zentrum in Garching, Germany
Thin film fabrication by molecular beam epitaxyat the Jülich Centre for Neutron Science at Heinz Mayer-Leibnitz Zentrum in Garching, Germany
Rational design and implementation of new generations of functional materials for energy conversion and storage, requires better fundamental understanding of these systems along with the ability to predict their properties accurately. [1-3] Utilizing thin film systems, the knowledge of the driving p...
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Personal Name(s): | Pütter, Sabine (Corresponding author) |
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Contributing Institute: |
Streumethoden; JCNS-2 Streumethoden; PGI-4 JCNS-FRM-II; JCNS-FRM-II |
Imprint: |
2018
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Conference: | Faculty Seminar, Indore (India), 2018-12-15 - 2018-12-15 |
Document Type: |
Talk (non-conference) |
Research Program: |
Controlling Collective States Quantum Condensed Matter: Magnetism, Superconductivity FRM II / MLZ Jülich Centre for Neutron Research (JCNS) |
Subject (ZB): | |
Publikationsportal JuSER |
Rational design and implementation of new generations of functional materials for energy conversion and storage, requires better fundamental understanding of these systems along with the ability to predict their properties accurately. [1-3] Utilizing thin film systems, the knowledge of the driving parameters to obtain them in high quality is crucial [4]. Molecular Beam Epitaxy (MBE) proves to be a versatile method to grow high quality and high purity epitaxial films with low intrinsic defect concentrations and atomic-layer control.At the JCNS thin film laboratory, we run an oxide MBE system for the growth of various types of samples, i.e. “classical” magnetic thin films, transition metal oxide heterostructures or just thin gold films for soft matter studies, acting as defined surfaces. However, every sample system comes with its own challenges which makes thin film growth a research topic on its own.In the presentation, we will give examples for high quality metal and complex oxide thin film systems all fabricated in the JCNS thin film laboratory, like SrCoOx, TiOx, Fe4N or Cu/Fe multilayers. The focus lies on stoichiometry, morphology and thickness precision and detailed information about the possibilities of sample fabrication for users will be given.For quasi in-situ neutron reflectometry on thin films which are sensitive to ambient air a small versatile transfer chamber can be utilized for sample transfer and measurement from the MBE laboratory to the neutron instrument MARIA [5]. To show the functionality we determined the magnetic moment per atom of polycrystalline Co thin films of different thickness by utilizing PNR at room temperature in a magnetic field of 300 mT under UHV conditions. The films were thermally deposited at room temperature on 200 Å Pt/MgO(001). By our measurements we quantitatively determine the magnetic moment and confirm that it increases with Co thickness and approaches for thick films the bulk value.Both, the MBE setup and the transfer chamber may be booked in combination with an application for beam time at neutron instruments like MARIA via the MLZ proposal system.[1] R. Waser, Nanoelectronics and Information Technology, Wiley-VCH, 3rd Ed. (2012) [2] J. Mannhart and D. G. Schlom, Science 327, 1607 (2010)[3] A. Soumyanaryan, N. Reyren, A. Fert and C. Panagopoulos, Nature 539, 509 (2016) [4] S. Pütter et al., Appl. Phys. Lett. 110, 012403 (2017)[5] A. Syed Mohd et al., Rev. Sci. Instrum. 87, 123909 (2016) |