Ferro- and metamagnetism of rare earth compounds

Magnetocaloric effect of rare earth mono-nitrides, TbN and HoN

“…The obtained T C values are plotted against RE atomic number in Fig. 4 together with literature values and those obtained in our previous work [18,19,21,22]. The present values agree reasonably well with the literature values, and show good reproducibility for GdN and DyN.…”

“…(1), so that an amount of free carbon should have remained in the product. Carbonitride did not seem to form in our samples because the present magnetic data sets and lattice parameters reasonably agreed with those of the mono-nitrides so far reported [18][19][20][21]. The amorphous free carbon is magnetically invisible so that it contributes only to the weight of each product.…”

Magnetocaloric effects of ferromagnetic erbium mononitride

“…The lattice parameters of other rare earth mononitrides (GdN, TbN, DyN and HoN) are also plotted against atomic number in Fig. 2 [2,3,[6][7][8]12]. The plots show a fairly good linear relation, which indicates that these mononitrides share a crystal structure with the lattice parameter that varies smoothly with atomic number.…”

“…For helium liquefaction, we need materials with the larger magnetic entropy change at a temperature slightly higher than the boiling point of helium. ErN is expected to be an effective magnetic refrigerant for helium liquefaction, because rare earth atom concentration in mononitride is larger than that in metal [3] and the magnetic transition temperature of ErN has been reported as 3.4-6 K [6][7][8].…”

Large negative magnetoresistance in reactive sputtered polycrystalline GdNx films

“…[1][2][3][4][5][6][7] However, the origin of magnetism in GdN is controversial. Recently, Duan et al 8 suggest that a next-nearest-neighbor antiferromagnetic superexchange interaction coexists along with RKKY nearestneighbor interaction.…”