The ESR in situ of a Nb-Au-Nb SNS junction is reported. The Au was alloyed with 100 to 1000 ppm Gd and **1**6**7Er respectively. The crystal field splitting for Gd and the hyperfine splitting for Er**1**6**7 are detected in the I-V characteristic.
|Original language||English (US)|
|Number of pages||2|
|State||Published - Dec 1 1984|
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