EB in core/shell nanowires

Magnetic Core-Shell Structure and Proximity Effect in 7 nm Single-Crystal Co3O4 Nanowires.
Ping Lv, Yan Zhang, Rui Xu, Jia-Cai Nie, Lin He
ArXiv_1109.4989 (2011)

(a) M(H) curves at 5 K under ZFC and FC modes. For the FC hysteresis loop, the sample is cooled in HFC = 20 kOe from 100 K to 5 K. (b) Left Y-axis shows the ratio of pinned magnetic moments Pin = Mpin/MS at 5 K. The right Y-axis shows theexchange bias field HE and coercivity HC at 5 K.