Mr. Jiao Xinbing Profile

Jiao Xinbing

at Shanghai Institute of Optics and Fine Mechanics

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Proceedings Article | 20 March 2009 Paper

Laser assisted magnetic recording properties using SiAg near-field super-resolution structure

Xinbing Jiao, Jingsong Wei, Fuxi Gan

Proceedings Volume 7125, 71250R (2009) https://doi.org/10.1117/12.822921

KEYWORDS: Magnetism, Super resolution, Near field optics, Near field, Thin films, Sputter deposition, Pulsed laser operation, Photomasks, Laser optics, Radio optics

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Laser assisted magnetic recording properties were obtained by SiAg nonmagnetic mask layer combined near-field coupled super-resolution technique. The film structure was "Glass/SiN(30nm)/SiAg(20nm)/SiN(20nm)/TbFeCo(50nm)/SiN(10nm)". SiN and TbFeCo films were prepared by Radio frequency (RF) and Direct current (DC) magnetron sputtering respectively. The SiAg nonmagnetic mask layer was deposited by co-sputtering from a composite target. In the process of sputtering, the substrate negative DC bias voltage was kept at about 100V. Magnetic properties were obtained by vibrating sample magnetometer(VSM) and the magneto optical Kerr measurement. The magnetic recording was conducted by a home-made laser-assisted optic-magnetic hybrid recording setup, whose laser wavelength is 406.7nm and numerical aperture of converging lens is 0.80, respectively. The optical spot size is about 600nm. In the course of recording, the laser pulse was fixed at 100ns, and the magnetic field intensity was 300 Oe. The magnetic domains with a size of about 100nm were obtained, which is about 1/6 of the optical spot size. The analysis indicates that the SiAg nonmagnetic mask layer played a key role in reducing the magnetic domain size.

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