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Magnetically superior and easy to handle -FePt nanocrystals
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22.For -coated fcc FePt and bare -FePt nanoparticles [Figs. 2(a) and 2(c)], the specimen for the TEM observations was prepared by placing a drop of the particle-containing original solution on the surface of a carbon-coated copper grid. For -coated -FePt nanoparticles [Fig. 2(b)], wads of coagulated particles were finely ground and dispersed in chloroform, a drop of which was used as just discussed.
23.The loop starts from , reaches the point of , and comes back to the starting point. The fact that the at the turning point of is considerably smaller than that at the starting point of seems to indicate a considerable distribution of around . That is, nanoparticles having large coercivities do not reverse their magnetization even at .
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