Figure 3
(a) Magnetic hysteresis loops for nanocrystalline and coarse-grained Ho measured at 50 K after zero-field cooling. The inset displays the recorded virgin curves; note the kinks at ∼1.40 T (nanocrystalline Ho) and ∼1.26 T (coarse-grained Ho). (b) The temperature dependence of the real part of the AC susceptibility of nanocrystalline and coarse-grained Ho (log-linear scale). The vertical magenta and blue dashed lines indicate, respectively, the Curie (TC) and Néel (TN) temperature of bulk Ho. |