Experimental Study of Perpendicular Write Head Performance Beyond 2 Gbps Data Rates

It has been suggested that magnetization switching dynamics at low energy damping could result in severe write field loss at high data rate for perpendicular recording. To experimentally study the possible dynamic effect and to investigate write field loss at extremely high data rates for today's state-of-the-art perpendicular write heads, recording tests at data rates beyond 2 Gbits/sec-ond are performed with specially designed experimental measurements on a contact tester.