Mozaic technology innovation

Gen 2 superlattice platinum-alloy media

Combating magnetic instability at the nanoscale

Engineered to combat magnetic instability at the nanoscale, our Gen 2 superlattice platinum‑alloy media packs highly stable nanoparticles more densely for higher capacity and scalable production

Designed for denser, more stable data storage

Seagate’s second‑generation superlattice platinum‑alloy media improves efficiency while maintaining — and in many cases increasing — areal density.

Highly stable magnetic nanoparticles, each acting as a single bit of data, can be packed closer together than in conventional PMR drives or earlier Mozaic™ generations. The result is greater data stability and stronger resistance to thermal fluctuations, enabling higher capacity without compromising reliability.

Its essence lies in the use of platinum (Pt) and iron (Fe) particles

Within the superlattice platinum-alloy media, each nanoparticle, only a few nanometers in size, acts as an individual bit of data.

This fine granularity is made possible by the media’s high magnetic anisotropy — which means that the magnetic orientation of the material remains steady over time, ensuring that each bit is stable and unaltered by the writing of adjacent data.

The media’s unique magnetic alloys favor a predetermined magnetic orientation

This is key to stabilizing the magnetic state of individual bits, thereby reducing their susceptibility to thermal fluctuations.

Its high magnetic anisotropy provides the stability needed for recorded bits achieving record areal densities — bits that are placed together more densely than in any other hard drives in history.

Achieving order within the media involves sophisticated manufacturing

Epitaxial growth is used to deposit FePt thin films on crystalline underlayers on a special glass substrate. These underlayers serve as a template, dictating the orientation and ordering of the FePt grains during the deposition process.

Subsequent annealing at high temperatures further promotes ordering in the FePt grains, leading to a phase transformation that enhances the media's magnetic properties and grain alignment.

This intricate and carefully controlled process provides a robust, stable platform for high-density data storage

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