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Isotope-periodic multilayer method for short self-diffusion paths – a comparative neutron and synchrotron Mössbauer reflectometric study of FePd alloys

Merkel, D. G. ; Sajti, S. ; Fetzer, C. ; Major, J. ; Major, M. ; Rüffer, R. ; Rühm, A. ; Stankov, S. ; Tanczikó, F. ; Bottyán, L. (2024)
Isotope-periodic multilayer method for short self-diffusion paths – a comparative neutron and synchrotron Mössbauer reflectometric study of FePd alloys.
In: Journal of Physics: Conference Series, 2010, 211 (1)
doi: 10.26083/tuprints-00020657
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Isotope-periodic multilayer method for short self-diffusion paths – a comparative neutron and synchrotron Mössbauer reflectometric study of FePd alloys
Language: English
Date: 12 February 2024
Place of Publication: Darmstadt
Year of primary publication: 1 February 2010
Place of primary publication: Bristol
Publisher: IOP Publishing
Journal or Publication Title: Journal of Physics: Conference Series
Volume of the journal: 211
Issue Number: 1
Collation: 6 Seiten
DOI: 10.26083/tuprints-00020657
Corresponding Links:
Origin: Secondary publication DeepGreen
Abstract:

FePt, FePd, CoPt, and CoPd in equilibrium exhibit the L1₀ structure with high perpendicular magnetic anisotropy making them attractive candidates for high-density magnetic recording. Magnetic properties of these films depend on the distribution and orientation of the L1₀ fraction controlled by diffusion on atomic scale. Epitaxial isotope-periodic natFePd/⁵⁷FePd alloy films were prepared by molecular beam epitaxy and heat treated at 500°C for various retention times. Isotope-sensitive non-destructive methods, neutron reflectometry and synchrotron Mössbauer reflectometry were applied to follow very short diffusion paths normal to the film plane. Squared diffusion lengths and diffusion profiles were obtained from the fitting of experimental reflectivity curves for each annealing treatment steps. The somewhat different diffusion lengths obtained for the neutron and synchrotronMössbauer reflectograms of the same samples are explained by the larger footprint of the sample in the neutron experiment for which interface inhomogeneities are to be averaged. Diffusion in the microscopically different local environments were modelled by piecewise constant diffusion coefficients in the regions identified as different species by conversion electron Mössbauer spectroscopy.

Identification Number: Artikel-ID: 012029
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-206576
Additional Information:

Polarized Neutrons and Synchrotron X-rays for Magnetism Conference 2009 2–5 August 2009, Bonn, Germany

Classification DDC: 500 Science and mathematics > 500 Science
600 Technology, medicine, applied sciences > 660 Chemical engineering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
Date Deposited: 12 Feb 2024 14:48
Last Modified: 10 May 2024 08:14
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20657
PPN: 517678446
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