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Published on: November 21, 2019
Hysteresis effect in FePd magnetic stripes studied by coherent soft X-ray resonant magnetic scattering
K Chesnel1, G van der Laan, F Livet
1ALS, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA. kchesnel@lbl.gov
Abstract:
An FePd thin film sample, showing magnetic stripe domains as imaged by magnetic force microscopy, has been measured by soft X-ray resonant magnetic scattering in reflection geometry. Illumination with coherent radiation, produced by inserting a 20 microm pinhole in front of the sample, leads to a magnetic speckle pattern in the scattered intensity that gives access to the domain morphology. Application of an in-plane magnetic field for a few seconds gives a strong change in the observed intensity fluctuations, which indicates a large degree of variation between the two patterns taken before and after field exposure. From the speckle pattern we calculate a degree of coherence of beta = 0.5 for the incident beam.
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