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(a) Differential scanning calorimetry of an as prepared sample at a scan rate of .1 The areas enclosed by each peak, in units of energy release per gram of sample, are shown in the figure. The two exothermic peaks separate stages I, II, and III, discussed in the text. (b) Grain size evolution with annealing temperature obtained from x-ray diffraction. The observed influence of magnetic field on crystal size at annealing temperature has been included.
Micrographs of the alloy annealed at for under 0 (a), 4000 (b), and (c) magnetic fields. As a representative example a HREM image and its corresponding fast Fourier transform (FFT) of a particle of the sample annealed without magnetic field are depicted (d).
(a) Magnetization under a constant field dc vs the measuring temperature for : as-cast sample (i) and annealed at at 0 (ii) and (ii) and : as-cast sample (iv). (b) X-ray diffraction patterns for annealed samples at without magnetic field (i) and in the presence of (ii) magnetic field.
HREM micrograph for annealed sample at (a). An enhanced image of a particle and its corresponding FT along (b) show the lattice distances and the  direction is arrowed.
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