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We show that the spin polarization of the secondary electrons, P(E), yields useful information about the electron-electron interaction. The ration of majority to minority spin lifetimes is related to the measured values of P(E) by τ{uarr}(E)/τ{darr} (E = [(1-pB)/(1+pB)][(1+P(E))/(1-P(E))], where pB is the bulk magnetization.
Penn, D.
, Apell, S.
and Girvin, S.
(1986),
Spin Polarized Secondary Electrons: Theory, Journal of Magnetism and Magnetic Materials
(Accessed October 11, 2025)