Ion beam mixing of FeTi multilayers

Brenier, R.; Pérez, A.; Thévenard, P.; Treilleux, M.; Capra, T.

doi:10.1016/0025-5416(85)90376-3

Cited by 13 publications

(3 citation statements)

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“…The ion-beam mixing of Fe/Ti MLs is very sensitive to the contamination of the Fe/Ti system by carbon or oxygen. As was shown by Brenier et al [23], such a contamination can prevent the formation of the amorphous phase. However, in cleaner Fe/Ti MLs the amorphization effect due to Xe ion-beam mixing was reported [22].…”

Section: Discussionmentioning

confidence: 78%

“…Amorphization of the crystalline Fe/Ti multilayers by ion-beam mixing with Xe ions of energy of 800 keV was also demonstrated [22]. However, the possibility of the formation of the amorphous phase in this way depends strongly on the purity of the Fe and Ti layers and may be prohibited by carbon and oxygen contamination at the interfaces [23].…”

Section: Introductionmentioning

confidence: 99%

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Structural transformations induced in Fe/Ti multilayers by Ar- and Kr-ion irradiation

Kopcewicz

Jagielski

Stobiecki

2005

J. Phys.: Condens. Matter

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The structural transformations in Fe/Ti multilayers induced by Ar- and Kr-ion irradiation are studied by conversion electron Mössbauer spectroscopy (CEMS). Samples of Ti-to-Fe thickness ratios β = dTi/dFe = 1 (nominal composition Fe0.6Ti0.4) and β = 1.5 (Fe0.5Ti0.5) with modulation wavelengths Λ = 10–60 nm (Λ = dFe+dTi, where dFe and dTi are the elemental thickness of Fe and Ti layers) were used. The total thickness of the films was 240 nm. The ion-beam mixing of multilayers was induced by 200 keV Ar2+ and 350 keV Kr2+ ion irradiation with fluences ranging from 5 × 1013 to 1.3 × 1017 cm−2 (Ar) and 0.5 × 1013 to 5.6 × 1016 cm−2 (Kr). The ranges of Ar and Kr ions were about 105 and 95 nm, respectively. Ion-beam mixing process leads at low ion fluence to the formation of the solid state solution bcc-FeTi which at higher ion fluences converts to the amorphous FeTi phase. The degree of amorphization depends on the ion fluence, composition of the FeTi system and modulation wavelength. It was noted that the mixing efficiency is considerably larger for heavier ions (Kr as compared with Ar). The relative fractions of given phases were determined from the CEMS measurements. Deterioration of the amorphous phase and partial restoration of the bcc-FeTi solid solution at highest Ar-ion fluences was observed. The results were interpreted based on the enthalpy curves for amorphous FeTi and bcc-FeTi solid solutions.

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Section: Discussionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Structural transformations induced in Fe/Ti multilayers by Ar- and Kr-ion irradiation

Kopcewicz

Jagielski

Stobiecki

2005

J. Phys.: Condens. Matter

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“…The possibility of the formation of such a phase was studied for Fe/Ti multilayers exposed to Xe-ion irradiation. Contradicting results were reported by Brenier et al, who in some cases did not detect the amorphous FeTi phase [11], while in other cases the formation of the amorphous FeTi was well documented [6,12]. Amorphization of Fe/Ti multilayers with various modulation wavelengths and compositions, induced by Ar-and Kr-ion-beam mixing, was reported recently [13].…”

Section: Introductionmentioning

confidence: 80%

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Kopcewicz

Jagielski

Grabias

2000

J. Phys.: Condens. Matter

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Bulk -Fe has been implanted with 200 keV Ti ions with doses ranging from 1 × 1017 to 8 × 1017 at. Ti cm-2 and characterized by conversion electron Mössbauer spectroscopy (CEMS). The CEMS spectra recorded for the low dose Ti implantation of the surface region reveal the formation of the crystalline phases (bcc-FeTi solid solution and FeTi intermetallic compound) and of the amorphous Fe-Ti-C phase. For Ti doses exceeding 4 × 1017 at. Ti cm-2 the amorphous FeTi phase is formed, whose relative spectral fraction saturates at about 40% of the total spectral area at 6 × 1017 at. Ti cm-2 . At high ion doses the amorphous Fe-Ti-C phase disappears but the bcc-FeTi and crystalline intermetallic FeTi phases persist, beside the amorphous FeTi phase, even at the highest Ti dose used.

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Surface properties and activation

Schlapbach

1992

Topics in Applied Physics

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Ion beam mixing of FeTi multilayers

Cited by 13 publications

References 5 publications

Structural transformations induced in Fe/Ti multilayers by Ar- and Kr-ion irradiation

Structural transformations induced in Fe/Ti multilayers by Ar- and Kr-ion irradiation

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Surface properties and activation

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