Temperature-dependent secondary electron yield from ion bombardment of gold and copper oxide superconductors

1 November 1988

journal article
research article
Published by American Physical Society (APS) in Physical Review B

Vol. 38 (13) , 9224-9226
https://doi.org/10.1103/physrevb.38.9224

Abstract

First measurements on the ion-induced kinetic secondary-electron emission have been performed with low beam current densities in the low target temperature range

70 K < T < 300 K

under good vacuum conditions (

p \approx 5 \times 10^{- 7}

Pa) from sputter-cleaned Au foils (1000 Å) and from Y

{Ba}_{2}

{Cu}_{3}

O_{7}

. The secondary-electron yield

γ

decreases with decreasing temperature of Au and Y

{Ba}_{2}

{Cu}_{3}

O_{7}

targets. This is in contrast to the expectations based on previous experiments and theoretical considerations. In the case of Y

{Ba}_{2}

{Cu}_{3}

O_{7}

, a strong enhancement of

γ

below the superconducting transition temperature

T_{c}

is observed.

Keywords

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