Interface driven magnetic interactions in nanostructured thin films of iron nanocrystallites embedded in a copper matrix
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2 (Canada)
- Department of Materials Science and Engineering, National Chung Hsing University, Taichung, Taiwan (China)
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
We have fabricated thin films of iron nanocrystallites embedded in a copper matrix using a dual ion beam assisted deposition technique. A secondary End-Hall ion beam bombarded the iron atoms during deposition altering significantly the morphology of the films and allowing for control of the intermixing between iron and copper components. Cross-sectional transmission electron microscopy and x-ray reflectometry experiments indicated that the morphology of the films was that of iron nanocrystallites embedded in a copper matrix. Rietveld refinements of the diffraction pattern identified fcc-copper and amorphous iron. An increased amount of disorder was observed with a reduction in the amount of deposited iron from a 1:1 Fe:Cu ratio to 0.25:0.75 Fe:Cu ratio. Interfacial copper-iron alloys were identified by DC susceptibility experiments through their reduced T{sub C,Alloy} (370, 310, and 280 K) compared with that of bulk iron (∼1000 K). Element specific x-ray absorption and x-ray magnetic circular dichroism experiments were performed to identify the contributions to the magnetism from the iron and the copper-iron alloy.
- OSTI ID:
- 22409926
- Journal Information:
- Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
Crystalline structure and magnetic properties of structurally ordered cobalt–iron alloys grown on Bi-containing topological insulators and systems with giant Rashba splitting
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journal | January 2018 |
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