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Article

Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond

1
Division of Superconductivity and Magnetism, Felix-Bloch-Institute for Solid State Physics, University of Leipzig, 04103 Leipzig, Germany
2
Technological Institute for Superhard and Novel Carbon Materials, 7a Centralnaya Street, 108840 Moscow, Russia
3
Division of Applied Quantum Systems, Felix-Bloch-Institute for Solid State Physics, University of Leipzig, 04103 Leipzig, Germany
4
Institute of Medical Physics and Biophysics, University of Leipzig, 04107 Leipzig, Germany
*
Author to whom correspondence should be addressed.
Current address: Moscow Institute of Physics and Technology, 9 Institutskiy Per., 141701 Moscow, Russia.
Current address: Condensed Matter Physics and Microelectronics Division, Faculty of Physics, Sofia University St. Kl. Ohridski, James Bouchier Blvd 5, 1164 Sofia, Bulgaria.
Academic Editor: Zaneta Swiatkowska-Warkocka
Materials 2022, 15(3), 1014; https://doi.org/10.3390/ma15031014
Received: 6 December 2021 / Revised: 15 January 2022 / Accepted: 25 January 2022 / Published: 28 January 2022
(This article belongs to the Special Issue Laser Machining Technology in Materials Science)
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. View Full-Text
Keywords: diamond; magnetic order; laser treatment diamond; magnetic order; laser treatment
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MDPI and ACS Style

Setzer, A.; Esquinazi, P.D.; Buga, S.; Georgieva, M.T.; Reinert, T.; Venus, T.; Estrela-Lopis, I.; Ivashenko, A.; Bondarenko, M.; Böhlmann, W.; Meijer, J. Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond. Materials 2022, 15, 1014. https://doi.org/10.3390/ma15031014

AMA Style

Setzer A, Esquinazi PD, Buga S, Georgieva MT, Reinert T, Venus T, Estrela-Lopis I, Ivashenko A, Bondarenko M, Böhlmann W, Meijer J. Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond. Materials. 2022; 15(3):1014. https://doi.org/10.3390/ma15031014

Chicago/Turabian Style

Setzer, Annette, Pablo D. Esquinazi, Sergei Buga, Milena T. Georgieva, Tilo Reinert, Tom Venus, Irina Estrela-Lopis, Andrei Ivashenko, Maria Bondarenko, Winfried Böhlmann, and Jan Meijer. 2022. "Nanometers-Thick Ferromagnetic Surface Produced by Laser Cutting of Diamond" Materials 15, no. 3: 1014. https://doi.org/10.3390/ma15031014

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