We report the recrystallization of amorphous Yttrium Iron Garnet (YIG) thin films by annealing in an argon atmosphere. Our results show that the amorphous film transforms into a fully epitaxial layer. Compared to annealing in oxygen, the argon atmosphere has no significantly deteriorating influence on the structural and magnetic properties of the YIG thin films. In ferromagnetic resonance experiments, low damping and narrow linewidth can be obtained. For a 65 nm thick layer, a damping constant of α = (1.61 ± 0.25) × 10–4 is found and the linewidth at 9.6 GHz is as small as 2.26 ± 0.10 Oe. These values are comparable to the best results for YIG thin films grown at high temperature pulsed laser deposition and almost as good as for thin YIG films deposited at room temperature and annealed in oxygen. Annealing in vacuum or growth in argon atmosphere, however, results in non-magnetic material.
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28 August 2017
Research Article|
August 29 2017
Annealing of amorphous yttrium iron garnet thin films in argon atmosphere
Christoph Hauser;
Christoph Hauser
1
Institute of Physics, Martin-Luther-Universität Halle-Wittenberg
, Von-Danckelmann-Platz 3, 06120 Halle, Germany
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Christian Eisenschmidt;
Christian Eisenschmidt
1
Institute of Physics, Martin-Luther-Universität Halle-Wittenberg
, Von-Danckelmann-Platz 3, 06120 Halle, Germany
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Tim Richter;
Tim Richter
1
Institute of Physics, Martin-Luther-Universität Halle-Wittenberg
, Von-Danckelmann-Platz 3, 06120 Halle, Germany
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Alexander Müller;
Alexander Müller
1
Institute of Physics, Martin-Luther-Universität Halle-Wittenberg
, Von-Danckelmann-Platz 3, 06120 Halle, Germany
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Hakan Deniz;
Hakan Deniz
2
Max-Planck-Institut für Mikrostrukturphysik
, Weinberg 2, 06120 Halle, Germany
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Georg Schmidt
Georg Schmidt
a)
1
Institute of Physics, Martin-Luther-Universität Halle-Wittenberg
, Von-Danckelmann-Platz 3, 06120 Halle, Germany
3
Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Nanotechnikum Weinberg
, Heinrich-Damerow-Str. 4, 06120 Halle, Germany
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a)
Author to whom correspondence should be addressed: georg.schmidt@physik.uni-halle.de
J. Appl. Phys. 122, 083908 (2017)
Article history
Received:
March 28 2017
Accepted:
August 10 2017
Citation
Christoph Hauser, Christian Eisenschmidt, Tim Richter, Alexander Müller, Hakan Deniz, Georg Schmidt; Annealing of amorphous yttrium iron garnet thin films in argon atmosphere. J. Appl. Phys. 28 August 2017; 122 (8): 083908. https://doi.org/10.1063/1.4999829
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