Effect of interfacial s-d scattering on transport in structures ferromagnet/insulator/ferromagnet

Accessing the fundamentals of magnetotransport in metals with terahertz probes

“…Now, using equation (2) and assuming an effective mass for the conduction sp-electrons m * = m 0 (ref. 48), we obtain the corresponding values for the sheet densities of majority-and minority-spin conduction electrons of N ↑ = (1.35 ± 0.02) × 10 20 m −2 and N ↓ = (1.36 ± 0.10) × 10 20 m −2 , which are found to be identical within the error, thus proving the validity of the notion that only the electrons from the non-spinsplit sp-band participate in the conduction. We however comment, that generally the asymmetry in densities for spin-↑ and spin-↓ conduction electrons in a ferromagnet is possible 49,50 , and therefore it should not be assumed a priori but rather verified as shown here.…”