Structure and magnetic properties of nanocrystalline PrCo3

Abstract

The structure and magnetic properties of nanocrystalline PrCo3 prepared by high-energy milling technique have been investigated by means of X-ray diffraction using the Rietveld method coupled to Curie temperature and magnetic measurements. The as-milled samples were subsequently annealed in temperature range from 750 to 1050• C for 30 min to optimize the extrinsic properties. From x-ray studies of magnetic aligned samples, the magnetic anisotropy of this compounds is found uniaxial. The Curie temperature is 349 K and no saturation reached at room temperature for applied field of 90 kOe. The coercive field of 55 kOe and 12 kOe measured at 10 and 293 K respectively is obtained after annealing at 750• C for 30 min suggests that nanocrystalline PrCo3 are interesting candidates in the field of permanent magnets. We have completed this experimental study by simulations in the micromagnetic framework in order to get a qualitative picture of the microstructure effect on the macroscopic magnetization curve. From this simple model calculation, we can suggest that the after annealing the system behaves as magnetically hard crystallites embedded in a weakly magnetized amorphous matrix.

Anisotropy induced large exchange bias behavior in ball milled Ni–Co–Mn–Sb alloys

“…Such an increase in the magnetic anisotropy has also been observed in other ball milled samples as well. 16,17 The decrease in FM strength in the ball milled sample for both x = 0 and 5 is identical to that seen in ball milled Ni-Mn-Sn sample. 13 To further study the origin of the large thermomagnetic irreversibility observed in Fig.…”

Magnetism of DyNi2B2C nanoparticle investigated with a quantum simulation model

“…Unfortunately, the applications of this theoretical approach have been limited to the nanosystems containing only the 3d magnetic ions. As to the rare-earth nanomagnets, researchers are still resorting to the two classical approaches [13][14][15][16][17][18][19]. Therefore, a quantum simulating method for rare-earth nanomagnets is imminently needed obviously.…”

Structure and Magnetic Properties of Intermetallic Rare-Earth-Transition-Metal Compounds: A Review

“…In addition, nanocrystalline compounds PrCo , Pr Co and Pr Co , constituted of intergrowths of AB -AB stacking blocks, were studied [ 120 , 121 , 122 ]. Thanks to the optimization of their microstructures we obtained the following coercivities 12 kOe, 18 kOe, 15 kOe for PrCo , Pr Co , Pr Co , respectively.…”