Electron Spin Polarization in Inner-Shell Excitations in a Solid

Using a ferromagnetic solid as an array of spin-polarized atoms allows one to measure directly the spin dependence of electron scattering in core excitations. Strong spin polarization of the 3p→3d energy-loss electrons scattered from ferromagnetic Fe₈₃{B}₁₇$ has been observed. The large spin polarization in the autoionization emission satellite above the $MMM$ Auger line is discussed.