Magnetic grains Bit transition
In a typical longitudinal recording layer the magnetic anisotropy axes of individual grains are randomly oriented in the plane of the film In perpendicular recording layer the anisotropy axis is relatively well aligned (<2 -4 degrees) perpendicular to the plane of the film Magnetic grains
Numerical Calculations*
Media Stack Glass Substrate
~190 ktpi 400 nm Writer ~400 ktpi 130 nm Reader
1 1 2 2 3 3 4 4 5 5 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5
Comparative MFM Images of Atomic-size Information obtained by the Conventional State-ofthe-art MFM (left) and the FIU-developed “Smart” Nano-probe
Recorded Pattern in Layer 6
Recorded Pattern in Layer 4
Recorded Pattern in Layer 2
Issues:
The Proposed Solution to Demonstrate the Feasibility of Protein Based Storage
Note: Patented approach to immobilize proteins Into stable thin-film recording media (H. Arjomandi, V. Renugopalakrishnan)
Note: The modular structure of the system allows simultaneously using more than one (currently, up to four) sources (red to blue lasers, UV lamps) to conduct photons through a fiber to the sample in the nearfield regime. In addition, as described below, the system will allow implementing diode lasers assembled right at the air bearing surfaces (ABS) of the recording probes attached to the SPM’s cantilever.
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