Easy directions of magnetization in ternary R<inf>2</inf>(Co, Fe)<inf>17</inf>phases

Structural and magnetic characterization of composite YCo5/α-Fe (20wt%) powders prepared by mechanical alloying and subsequent annealing

“…In addition, samples show both, low remanent magnetization and intrinsic coercivity ( i H C varied from 470 to 800 Oe). So, samples are magnetically soft in agreement with the planar anisotropy character of the rhombohedral intermetallic compound Y 2 (Co 1Àx Fe x ) 17 formed [18,19].…”

Magnetic Properties of theRE2Pt6X15(RE= Y, La–Nd, Sm, Gd–Lu;X= Al, Ga) Series

“…But also other rare‐earth metal containing compounds have gained attention, e.g. Gd 5 Si 2 Ge 2 due to its giant magnetocaloric effect,, or SmCo 5 ,, Sm 2 Co 17 , and the famous Nd 2 Fe 14 B due to their permanent magnetic properties.…”

Anisotropy and orbital moment in Sm-Co permanent magnets

“…The development started with SmCo 5 , which combines a relatively high saturation magnetization M s and a high Curie temperature T c with an excellent magnetocrystalline anisotropy constant K 1 of about 17.2 MJ/m 3 [1,2,7,13,14]. However, Sm and Co are fairly expensive elements, and atomic substitutions began to be explored around 1970 [13,[15][16][17].…”

“…An obstacle is the very limited equilibrium solubility of Fe in the SmCo 5 phase, which is metastable even without Fe addition. Other additives, such as Ti, Cu, Zr, Nb, and Ni, which were also considered from a very early stage [5,16,17,[18][19][20][21][22][23][24][25][26], often improve coercivity but tend to further reduce the magnetization and can therefore only be used in small amounts. A breakthrough occurred with the recognition that Co doping with Cu enhances the solubility of Fe and eventually leads to the formation of a high-magnetization Sm 2 (Co 1−x Fe x ) 17 phase surrounded by Sm(Co, Cu) 5 grain boundaries [3,16,27,28].…”