Title :
Design and modelling of dual spin-valve heads
Author :
Pan, G. ; Huo, S. ; Mapps, D.J. ; Clegg, W.W.
Author_Institution :
Sch. of Electron. Commun. & Electr. Eng., Plymouth Univ., UK
fDate :
9/1/1999 12:00:00 AM
Abstract :
Two types of dual spin-valve head structure, the anti-parallel and parallel dual spin-valve heads, were proposed. Both dual spin-valve heads are thermal noise immune due to differential voltage sensing. The transfer functions of the two dual structures were analysed and transfer curves of shielded heads were simulated using a 3-D finite element method. Results have shown that the anti-parallel dual spin-valve head exhibits greater linear dynamic range than a single spin-valve head and almost doubled output of a single spin-valve head. It also has an ideal transfer curve passing through the origin independent of the bias state of single spin-valves
Keywords :
finite element analysis; magnetic heads; spin valves; transfer functions; 3D FEM simulation; anti-parallel structure; design; differential voltage sensing; dual spin-valve heads; linear dynamic range; modelling; parallel structure; shielded heads; thermal noise immune; transfer curves; transfer functions; Analytical models; Anisotropic magnetoresistance; Giant magnetoresistance; Magnetic heads; Magnetic noise; Magnetic properties; Magnetization; Transfer functions; Valves; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on