A neutron diffraction and Mössbauer effect study of the Nd2Fe17−xSix solid solutions

Effect of Substitution of Iron by Cobalt on the Physical Properties in the Sm2Fe14Mn3 Compound

“…There are two ways to improve the magnetic properties of R 2 Fe 17 compounds. The first one is a partial substitution of iron by a metal or a metalloid [2][3][4][5][6] or a partial substitution of the rare earth element [7,8]. The second method is by interstitial modification of nitrogenation or carbon [9].…”

Neutron Diffraction Study of Nd2Fe16TiDy at 300 and 1.5 K

“…The magnetic moment obtained on 6c site, in the hydride one, is higher than those obtained for the other iron sites. Comparison of the magnetic moments as refined at room temperature and at 1.5 K in Nd 2 Fe 16.3 Ti 0.7 D 4.8 , shows that the thermal decrease of magnetization is mainly due to the decrease of the magnetic moment of Nd (Table 1) [13] (1), Nd 2 Fe 16.3 Ti 0.7 D 4.8 (2) and Nd 2 Fe 17 [11] (3) at 300 and 1.5 K (the last digit is significant) atoms affects the thermal variation magnetization, such a feature has been observed for other R 2 Fe 17 hydrides [16,17]. For the Nd 2 Fe 16.3 Ti 0.7 D 4.8 compound, the decrease of the rare-earth magnetic moment (3 to 1.7 m B ) from 1.5 K to 300 K is much more pronounced.…”

“…The crystallographic and magnetic properties of the pseudo-binary Nd 2 Fe 17--x M x solid solutions, where M is a metal or a metalloid, have been extensively studied [1][2][3][4][5] because the substitution of iron by a non-magnetic atom M increases the Curie temperature of the material, at least for x values smaller than three.…”

“…For x less than two, aluminum, silicon and gallium [1][2][3][4] show a strong preference for the 18h site, whereas titanium, vanadium, and niobium [5] show a strong preference for the 6c site. A preliminary study of an earlier sample of Nd 2 Fe 16 Ti has already been reported [6].…”

Effect of combined metal-carbon additions on the microstructure and structure of Sm2Fe17

“…18 Si strongly prefers the Fe 18(h) site. 24 Site preference for transition metals alloyed in combination with carbon were found to be more complicated, with site preference split between 6(c), 18( f ), and 18(h) sites. 13,22 However, the substitution levels in these studies were as much as twice as high, and there may be primary, secondary, etc., site preference hierarchy that has not been investigated.…”