Carnegie Mellon University

Data Storage Systems Center

College of Engineering

Research at DSSC

Re-Think the Modeling of FePt L10 Grain in HAMR Media: Incoherent Switching and Multi-domain Grains

Re-Think the Modeling of FePt L10 Grain in HAMR Media: Incoherent Switching and Multi-domain Grains

Perfect L10 ordering of FePt forms alternating monolayers of pure Fe and pure Pt along the ordering direction. It is believed that the Fe-Fe direct exchange coupling within each Fe monolayer is significantly stronger than the exchange coupling between adjacent Fe monolayers and Grain Curie temperature should be dominated by the intra-layer Fe-Fe exchange.

Learn more

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.

Learn More

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.

Learn more

Faculty Research Videos