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Holographic imaging of interlayer coupling in Co/Pt/NiFe

DOI: 10.1088/1367-2630/15/2/023045 DOI Help

Authors: Thomas Duckworth (University of Exeter) , Feodor Ogrin (University of Exeter) , Guillaume Beutier (CEA, INAC) , Sarnjeet Dhesi (Diamond Light Source) , Stuart Cavill (University of York, Diamond Light Source) , Sean Langridge (ISIS, STFC Rutherford Appleton Laboratory) , Amy Whiteside (University of Leeds) , Thomas Moore (University of Leeds) , Maxime Dupraz (SIMAP) , Flora Yakhou-harris (ESRF) , Gerrit Van Der Laan (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: New Journal Of Physics , VOL 15

State: Published (Approved)
Published: February 2013

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 μm 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.

Journal Keywords: Configuration; Fourier Transformation; Ground States; Holography; Images; Layers; Magnetic Fields; Magnetization; Permalloy; Sensitivity; X Radiation

Subject Areas: Physics, Materials, Technique Development

Instruments: I06-Nanoscience

Other Facilities: ID08, ESRF

Added On: 02/04/2013 13:11

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