XMCD studies of thin Co films on BaTiO\(_3\)

Different layer thicknesses of Cobalt ranging from 2.6 Å (1.5 ML) up to 55 Å (30.5 ML) deposited on ferroelectric BaTiO\(_3\) have been studied regarding their magnetic behavior. The layers have been characterized using XMCD spectroscopy at remanent magnetization. After careful data analysis the mag...

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Bibliographic Details
Published in:arXiv.org 2015-08
Main Authors: Welke, Martin, Gräfe, Joachim, Govind, Remya Kunjuveettil, Babu, Vasili Hari, Trautmann, Martin, Karl-Michael Schindler, Denecke, Reinhard
Format: Article
Language:English
Subjects:
Coalescing
Cobalt
Data analysis
Ferroelectric materials
Ferroelectricity
Island growth
Magnetic moments
Magnetic properties
Magnetism
Thickness
Thin films
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Summary:Different layer thicknesses of Cobalt ranging from 2.6 Å (1.5 ML) up to 55 Å (30.5 ML) deposited on ferroelectric BaTiO\(_3\) have been studied regarding their magnetic behavior. The layers have been characterized using XMCD spectroscopy at remanent magnetization. After careful data analysis the magnetic moments of the Cobalt could be determined using the sum rule formalism. There is a sudden and abrupt onset in magnetism starting at thicknesses of 9 Å (5 ML) of Cobalt for measurements at 120 K and of 10 Å (5.5 ML) if measured at room temperature. Initial island growth and subsequent coalescence of Co on BaTiO\(_3\) is suggested to explain the sudden onset. In that context, no magnetically dead layers are observed.
ISSN:2331-8422
DOI:10.48550/arxiv.1506.06496