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- Jaafar, M., et al.
(författare)
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FePt thin film irradiated with high energy ions
- 2007
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Ingår i: Physica status solidi. A, Applied research. - : Wiley. - 0031-8965 .- 1521-396X. ; 204:6, s. 1724-1730
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Tidskriftsartikel (refereegranskat)abstract
- The changes in structural and magnetic properties of FePt thin films due to the irradiation with high energy ions (Br7+ and Cl2+) were studied. From the hysteresis loops dominating in-plane anisotropy is derived, however, the samples present a minor out-of-plane component. The structure and the magnetic properties of the films can be tuned by selecting the appropriate irradiation parameters (different ions, energies and fluencies). For the irradiation parameters used in this study an in-plane anisotropy is favoured. Irradiation with Br7+ seems to induce minor changes in the structural ordering of the thin films, whereas the Cl2+ ions promote the amorphization of the surface of the films. In addition, a magnetic thin film pattemed at the micrometer scale was obtained after irradiation through a micrometric mask.
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| 2. |
- Ohgai, T., et al.
(författare)
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Electrodeposition of cobalt based ferro-magnetic metal nanowires in polycarbonate films with cylindrical nanochannels fabricated by heavy-ion-track etching
- 2008
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Ingår i: Journal of Applied Electrochemistry. - : Springer Science and Business Media LLC. - 0021-891X .- 1572-8838. ; 38:5, s. 713-719
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Tidskriftsartikel (refereegranskat)abstract
- Polycarbonate films of thickness 30 mu m were irradiated with heavy ions by applying a flux of 10(8) ions cm(-2) to produce straight tracks perpendicular to the film surface. The tracks were preferentially etched in 6 M aqueous solution of sodium hydroxide to prepare cylindrical nanochannels. The channel diameters were tuned between 200 and 600 nm by varying the etching time. Co81Cu19 alloy nanowires were electrodeposited potentiostatically, while Co/Cu multilayered nanowires, consisting of alternating Co and Cu layers with thickness 10 nm, were synthesized by means of a pulse plating technique in channels of length 30 mu m and diameter 200 nm. Co81Cu19 alloy nanowires showed an anisotropic magnetoresistance effect of 0.6%, and the giant magnetoresistance of Co/Cu multilayered nanowires reached up to 8.0%.
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| 8. |
- Jensen, Jens, et al.
(författare)
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Heavy ion beam-based nano- and micro-structuring of TiO2 single crystals using self-assembled masks
- 2008
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Ingår i: Nuclear Instruments and Methods in Physics Research Section B. - : Elsevier BV. - 0168-583X .- 1872-9584. ; 266:12-13, s. 3113-3119, s. 3113-3119
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Tidskriftsartikel (refereegranskat)abstract
- Fast heavy ion beam-based lithography using masks of self-assembled materials has been applied for transferring well-ordered nano- and micropatterns to rutile TiO2 single crystals. As the induced damage has a high etching selectivity the patterns can be developed in hydrofluoric acid with very high-contrast. Here we present resulting patterns when using a mask of self-ordered silica spheres. The obtained pattern are replicas of the mass distribution of the mask. In addition the shape and size of the regular structures depend on the applied ion energy and fluence. Direct modifications of the optical properties of TiO2 in a well-defined pattern are also presented. (c) 2008 Elsevier B.V. All rights reserved.
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| 9. |
- Jensen, Jens, et al.
(författare)
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Swift heavy ion beam-based nanopatterning using self-assembled masks
- 2007
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Ingår i: Ion-Beam-Based Nanofabrication. - Warrendale, Pa : Materials Research Society. - 9781558999800 ; , s. 55-60
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Konferensbidrag (refereegranskat)abstract
- Swift heavy ion beam-based lithography using masks of self-assembled materials has been applied for transferring well-ordered micro- and nanopatterns to rutile TiO2 single crystals. As the induced damage has a high etching selectivity the patterns can be developed in HF with very high contrast. Here we present resulting patterns when using a mask of self-ordered silica spheres. Since the obtained structures are replicas of the mass distribution of the applied mask, the shape and size of resulting structures depend on the geometric configuration of the silica sphere layers. In addition, the resulting pattern can be tuned by varying the applied ion energy and fluence. Direct modifications of the optical properties of TiO2 in a well-defined pattern are also presented.
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