Space filling by nucleation and growth in chemical vapor deposition of diamond

Stiegler, J.O.; Kaenel, Y. von; Cans, Michel; Blank, E.

doi:10.1557/jmr.1996.0086

Cited by 10 publications

(3 citation statements)

References 17 publications

(33 reference statements)

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“…Whereas the virgin surfaces of the samples showed a sharp absorption peak at 1332 cm

, corresponding to pure diamond (first order Raman), the laser-cut surfaces showed disordered graphite-like peaks due to the G-band (1580 cm

) and D-band (1350 cm

); see Figure 2 . In the case of the virgin surfaces, the peak at 1430 cm

observed in the CVD samples [ 25 , 26 , 27 ], was also clearly observed; see Figure 2 .…”

Section: Resultsmentioning

confidence: 80%

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Setzer¹,

Esquinazi²,

Буга

et al. 2022

Materials

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In this work, we demonstrate that cutting diamond crystals with a laser (532 nm wavelength, 0.5 mJ energy, 200 ns pulse duration at 15 kHz) produced a ≲20 nm thick surface layer with magnetic order at room temperature. We measured the magnetic moment of five natural and six CVD diamond crystals of different sizes, nitrogen contents and surface orientations with a SQUID magnetometer. A robust ferromagnetic response at 300 K was observed only for crystals that were cut with the laser along the (100) surface orientation. The magnetic signals were much weaker for the (110) and negligible for the (111) orientations. We attribute the magnetic order to the disordered graphite layer produced by the laser at the diamond surface. The ferromagnetic signal vanished after chemical etching or after moderate temperature annealing. The obtained results indicate that laser treatment of diamond may pave the way to create ferromagnetic spots at its surface.

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“…Whereas the virgin surfaces of the samples showed a sharp absorption peak at 1332 cm

, corresponding to pure diamond (first order Raman), the laser-cut surfaces showed disordered graphite-like peaks due to the G-band (1580 cm

) and D-band (1350 cm

); see Figure 2 . In the case of the virgin surfaces, the peak at 1430 cm

observed in the CVD samples [ 25 , 26 , 27 ], was also clearly observed; see Figure 2 .…”

Section: Resultsmentioning

confidence: 80%

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Setzer¹,

Esquinazi²,

Буга

et al. 2022

Materials

View full text Add to dashboard Cite

show abstract

“…In case of the untreated CVD samples surfaces the peak at 1430 cm −1 , known for CVD samples [19][20][21], is also clearly observed.…”

Section: B Ramanmentioning

confidence: 96%

Nanometers-thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Setzer,

Esquinazi,

Buga

et al. 2021

Preprint

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In this work, we demonstrate that cutting diamond crystals with a laser (532 nm wavelength, 0.5 mJ energy, 200 ns pulse duration at 15 kHz) produces a 20 nm thick surface layer with magnetic order at room temperature. We have measured the magnetic moment with a SQUID magnetometer of six natural and six CVD diamond crystals of different size, nitrogen content and surface orientations. A robust ferromagnetic response at 300 K is observed only for crystals that were cut with the laser along the (100) surface orientation. The magnetic signals are much weaker for the (110) and negligible for the (111) orientations. We attribute the magnetic order to the disordered graphite layer produced by the laser at the diamond surface. The ferromagnetic signal vanished after chemical etching or after moderate temperature annealing. The obtained results indicate that laser treatment of diamond may pave the way to create ferromagnetic spots at its surface.

show abstract

“…After cutting, a polishing on the cut face was performed. The laser beam with the 87 specified parameters, was focused right on the surface of the sample to burn part of the for CVD samples [19][20][21], is also clearly observed.…”

mentioning

confidence: 95%

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Setzer¹,

Esquinazi²,

Буга³

et al. 2021

Preprint

View full text Add to dashboard Cite

In this work, we demonstrate that cutting diamond crystals with a laser (532 nm wavelength, 0.5 mJ energy, 200 ns pulse duration at 15 kHz) produces a ≲20nm thick surface layer with magnetic order at room temperature. We have measured the magnetic moment with a SQUID magnetometer of six natural and six CVD diamond crystals of different size, nitrogen content and surface orientations. A robust ferromagnetic response at 300 K is observed only for crystals that were cut with the laser along the (100) surface orientation. The magnetic signals are much weaker for the (110) and negligible for the (111) orientations. We attribute the magnetic order to the disordered graphite layer produced by the laser at the diamond surface. The ferromagnetic signal vanished after chemical etching or after moderate temperature annealing. The obtained results indicate that laser treatment of diamond may pave the way to create ferromagnetic spots at its surface.

show abstract

Space filling by nucleation and growth in chemical vapor deposition of diamond

Cited by 10 publications

References 17 publications

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Nanometers-thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

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