Figure 4

(a) Temperature dependence of \(B_{hf}\) at sites A and B measured with \(^{111}\)Cd for sample S2 up to room temperature. The solid curves represent the Brillouin function for spin 5/2 (\(B_{hf}\) data in this temperature range are representative of sample S1). The inset shows the maximum of the ZFC curve. (b) \(M\times T\) curves and (c) M–H curves for sample S1. The inset in (c) shows the coercive field