Observation of an unconventional giant negative exchange bias effect in La${}_{0.5}$Sr${}_{0.5}$Co${}_{0.85}$Nb${}_{0.15}$O${}_3$

Rishabh Shukla, B. Schwarz, R. S. Dhaka

We find an unconventional giant negative exchange bias (EB) of $H_{\mathrm{EB}}$ = --14.1~kOe at 2~K (cooling field of 50~kOe) in the cluster spin-glass (CSG) La${}_{0.5}$Sr${}_{0.5}$Co$_{0…