Carnegie Mellon University

Data Storage Systems Center

College of Engineering

Research at DSSC

Novel Fabrication Method for FePt-L10 Based Granular HAMR Media

Novel Fabrication Method for FePt-L10 Based Granular HAMR Media

We have been developing a novel thin film growth process for HAMR media with controlled/enhanced FePt-L10 grain nucleation density on MgO underlayer. Co-sputtering of Au-SiOx on MgO underlayer followed by proper etching, a template of densely packed SiOx nano-craters with controlled pitch distance (<~ 5nm) can be formed.

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Iridium Facilitated Spin Hall Perpendicular MTJ Switching

Iridium Facilitated Spin Hall Perpendicular MTJ Switching

When using spin Hall effect to switching a perpendicularly magnetized magnetic tunnel junction (MTJ), an externally applied magnetic field in the film plane is required. In this research project, a thin iridium layer is inserted between the free layer of the perpendicular MTJ and an in plane magnetized synthetic antiferromagnet. The iridium layer serves a dual purpose: facilitating the spin Hall effect for spin injection and the in plane magnetic coupling for eliminating the need of the external in plane field.

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DNN-Based Machine Learning Channel for HDD Data Detection

DNN-Based Machine Learning Channel for HDD Data Detection

We have been developing machine learning (ML) channels as a possible alternative data detection/recovery technology for hard disk drives (HDD). One of the main objectives of this research project is to obtain in-depth understanding of the ML capability in this particular application as well developing new ML algorithms/schemes to possibly enhance the channel capability.

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Faculty Research Videos