Abstract
A polycrystalline NiFe-alloy target was bombarded by 5 keV Ar + or He + ions. The total and differential coefficients of secondary ion-electron emission as a function of temperature were measured. The yield of electrons with energy E=1.3±0.1 eV was found the most sensitive to temperature changes. At the nickel Curie temperature the yield of 1.3 eV electrons rapidly decreases in contrast to the very weak change of the total yield. Above the Curie temperature the magnetostrictive compensation of the thermal expansion vanishes and material transparency increases. This lead to an increase of the ion penetration depth and has the greatest influence on the yield of low energy electrons. The influence of the diffusion component and the inelastically scattered electron component in the ion-electron emission is discussed.
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