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Temperature dependencies of the ac susceptibility, , for single crystal at different ac amplitudes. The 1 T dc magnetic field is applied along  and  orientations of the crystal, respectively.
Angular dependencies of at different temperatures under the dc fields of (a) 1 and (b) 7 T. In (c), the temperature is fixed at 8 K and the magnetic fields change from 0.1 to 7 T. The ac amplitude is 1 Oe. The lines are the guides to the eyes.
Temperature dependencies of the in-plane anisotropy derived from Fig. 2. The inset shows the field dependence of . The lines are the guides to the eyes.
dc magnetic relaxations for fields along different crystal orientations. is the initial magnetization. The inset shows the normalized magnetic relaxation rate with respect to angle at 9 K. The line is the guide to the eyes.
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