Abstract We report on new experimental results for below-diffraction-limited hybrid recording. In our experiments, by means of focused laser assisted magnetic recording, the magnetic domains within TbFeCo thin films are obtained under an external perpendicular direct magnetic field. For a single magnetic medium, the domain size is mainly determined by the focused spot, which is about 620 nm for the laser wavelength $\lambda$ = 406 nm, and a numerical aperture of the lens of 0.80. However, when a silicon thin film structure is inserted between the substrate and the magnetic medium, the recording domains can be reduced obviously. By optimizing the experimental condition, even the size can be reduced to about 100 nm, which is below the diffraction limit, i.e. about 1/6 of the spot size. This is very useful for improving the hybrid recording density in practical applications.
Received: 19 March 2009
Revised: 24 April 2009
Accepted manuscript online:
(Magnetic properties of monolayers and thin films)
Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos 50772120 and
60490290), Funds of the Chinese Academy of Sciences for Key Topics
in Innovation Engineering (Grant No KJCXZYW.NANO.06), and the
National Basic Research Program
Cite this article:
Jiao Xin-Bing(焦新兵), Wei Jing-Song(魏劲松), and Gan Fu-Xi(干福熹) Below-diffraction-limited hybrid recording using silicon thin film super-resolution structure 2009 Chin. Phys. B 18 5370
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