(Phys.org)—Global demand for data storage is constantly increasing,driven by unusual technologies such as Big Data and the Internet of Things, as well as personal and enterprise storage. The tough disk drives that currently store the majority of the world's data have storage densities of just under 1 Terabit per square inch (Tb/in2). One of the promising technologies being researched for increasing the storage density is heat-assisted magnetic recording (HAMR), or which uses lasers to heat individual magnetic grains that are just a few nanometers long. The method requires controlling heat and magnetism on a tiny scale,which has made developing HAMR very challenging.
Source: phys.org