Figure 7.

Measured M(T) data under ZFC and FC modes for samples x = 0.0 (a) and x = 0.10 (b) respectively. The measuring field is 1.0 kHz. The measured M-H loops at T = 5 K for various samples are plotted in (c).

Measured M(T) data under ZFC and FC modes for samples x = 0.0 (a) and x = 0.10 (b) respectively. The measuring field is 1.0 kHz. The measured M-H loops at T = 5 K for various samples are plotted in (c).