Static Magnetic Proximity Effect in Pt Layers on Sputter-Deposited NiFe2O4 and on Fe of Various Thicknesses Investigated by XRMR

The longitudinal spin Seebeck effect is detected in sputter-deposited NiFe 2 O 4 films using Pt as a spin detector and compared with the previously investigated NiFe 2 O 4 films prepared by chemical vapor deposition. Anomalous Nernst effects induced by the magnetic proximity effect (MPE) in Pt can b...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2016-07, Vol.52 (7), p.1-4
Main Authors: Kuschel, Timo, Klewe, Christoph, Bougiatioti, Panagiota, Kuschel, Olga, Wollschlager, Joachim, Bouchenoire, Laurence, Brown, Simon D., Schmalhorst, Jan-Michael, Meier, Daniel, Reiss, Gunter
Format: Article
Language:English
Subjects:
Absorption
Iron
magnetic insulators
magnetic proximity effect
Magnetic resonance
Magnetism
Magnetometers
Perpendicular magnetic anisotropy
Saturation magnetization
spin Seebeck effect
x-ray resonant magnetic reflectivity
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Summary:The longitudinal spin Seebeck effect is detected in sputter-deposited NiFe 2 O 4 films using Pt as a spin detector and compared with the previously investigated NiFe 2 O 4 films prepared by chemical vapor deposition. Anomalous Nernst effects induced by the magnetic proximity effect (MPE) in Pt can be excluded for the sputter-deposited NiFe 2 O 4 films down to a certain limit, since X-ray resonant magnetic reflectivity measurements show no magnetic response down to a limit of 0.04 μB per Pt atom comparable with the case of the chemically deposited NiFe 2 O 4 films. These differently prepared films have various thicknesses. Therefore, we further studied Pt/Fe reference samples with various Fe thicknesses and could confirm that the MPE is only induced by the interface properties of the magnetic material.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2015.2512040