Unformatted text preview: r. The spacer here is to make sure that the bottom ferromagnetic will not affect
the spin of top ferromagnetic layer. When the spin-valve reads the spin from a data point, the spin
orientation of the free layer will change accordingly (align the spin direction with the data point). If the
spins of both ferromagnetic layers are parallel, the current will feel less scattering effects and lower
resistance state. On the contrary, if both spins are antiparallel, current feel more scattering, and lead to
higher resistance stat...
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- Fall '13