1. Holographic imaging of interlayer coupling in Co/Pt/NiFe
- Author
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Thomas A Duckworth, Feodor Y Ogrin, Guillaume Beutier, Sarnjeet S Dhesi, Stuart A Cavill, Sean Langridge, Amy Whiteside, Thomas Moore, Maxime Dupraz, Flora Yakhou, and Gerrit van der Laan
- Subjects
Science ,Physics ,QC1-999 - Abstract
We present a method to determine the magnetic configuration of an in-plane magnetized permalloy layer using Fourier transform holography with extended references in an off-normal geometry. We use a narrow slit as an extended holographic reference to record holograms with the sample surface orthogonal to the incident x-ray beam, as well as rotated by 30° and 45° with respect to the beam. To demonstrate the sensitivity of the technique to in-plane magnetization, we present images of flux closed ground states in thin (∼50 nm) permalloy elements, less than 1 μ m in lateral size. Images of the in-plane domain pattern which is magnetostatically imprinted into a permalloy film by the stray fields generated by an adjacent Co/Pt multilayer were obtained. It is found that, whilst the domain patterns within the two magnetic layers show a strong resemblance at remanence within a pristine sample, the similarities disappear after the sample is exposed to a saturating magnetic field.
- Published
- 2013
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