Title :
Junction edge instability in simple spin valve recording heads
Author :
Chen, Erli ; Saunders, Douglas ; Fernandez-de-Castro, Juan
Author_Institution :
Seagate Technol., Minneapolis, MN, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
Baseline popping (BLP) and baseline shift (BLS) in simple GMR heads has been studied experimentally. The instability occurs mainly at the sensor´s junction. Opening in the MR transfer curve is the source of the instability. This opening is caused by two local energy minima confined near one or both of the sensor edges, resulting in two free layer magnetization states. Media field plus thermal fluctuation can cause switching between these states
Keywords :
giant magnetoresistance; magnetic heads; magnetisation; spin valves; GMR heads; MR transfer curve; baseline popping; baseline shift; free layer magnetization states; junction edge instability; local energy minima; sensor edges; spin valve recording heads; thermal fluctuation; Anisotropic magnetoresistance; Fluctuations; Giant magnetoresistance; Magnetic confinement; Magnetic heads; Magnetic recording; Magnetic sensors; Magnetization; Spin valves; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
