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This is the world's highest recording density magnetic tape ever made, and could lead to tape cartridges with a storage capacity of 185 TB.
By comparison, the latest generation of magnetic tape storage devices, used mostly by data centres and corporate archives, can only store around 2.5 TB per cartridge. Unimpressive.
To make the new material, Sony used technology called sputter deposition, which involves shooting argon ions at a polymer film substrate. This produced layers of magnetic crystal particles with an average size of 7.7 nanometers.
Source: IT World
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