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Magnetic properties of amorphous Fe93Zr7 films: Effect of light ion implantation
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2015 (English)In: Journal of Applied Physics, ISSN 0021-8979, E-ISSN 1089-7550, Vol. 117, no 14, 143903Article in journal (Refereed) Published
Abstract [en]

The Curie temperature (T<inf>c</inf>) of amorphous FeZr alloys can be greatly enhanced by doping with light elements. In this investigation, ion implantation is used to dope Fe<inf>93</inf>Zr<inf>7</inf> thin films with H, He, B, C, and N. Extended X-ray absorption fine structure measurements confirm that the amorphous structure is preserved upon implantation for all samples, except for the N-implanted sample which is partially crystallized. The Curie temperature increases from 124 K for the pristine FeZr sample to about 400 K for the (FeZr)B<inf>0.11</inf> sample. The increase of T<inf>c</inf> is proportional to the increase in the average Fe-Fe distance, which allows us to conclude that the dominant cause of the T<inf>c</inf> enhancement of amorphous Fe<inf>93</inf>Zr<inf>7</inf> upon doping is a volume effect.

Place, publisher, year, edition, pages
2015. Vol. 117, no 14, 143903
Keyword [en]
Amorphous alloys, Amorphous films, Chemical elements, Curie temperature, Extended X ray absorption fine structure spectroscopy, Ion implantation, Semiconductor doping, X ray absorption, Zirconium, Amorphous structures, Extended X-ray absorption fine structure measurements, Fe-Zr alloy, Implanted samples, Light elements, Light ion implantation, Temperature increase, Volume effect
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-166979DOI: 10.1063/1.4917212ISI: 000352967400008Scopus ID: 2-s2.0-84927584795OAI: oai:DiVA.org:kth-166979DiVA: diva2:814767
Funder
Swedish Research Council
Note

QC 20150528

Available from: 2015-05-28 Created: 2015-05-21 Last updated: 2017-12-04Bibliographically approved

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Hallén, Anders

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