Magnetic properties of Dy2Co17−xSix compounds

Magnetic properties of Ln2.1Co16.9Si alloys

“…The binary compounds have the hexagonal Th 2 Ni 17 structure when Ln = Y, Ce, or Ho [1,2,6,7], whereas the rhombohedral Th 2 Zn 17 structure is observed when Ln = Pr, Nd, Gd, or Dy [3][4][5]8]. The same structures are exhibited by Ln 2 Co 17-x Si x pseudobinaries [1][2][3][4][5][6][7][8]. In some cases, for higher Si concentrations both structure types coexist (see e.g.…”

“…A strong uniaxial magnetic anisotropy is required to achieve high coercivity, however, the Ln 2 Co 17 binary compounds exhibit uniaxial anisotropy only for Ln = Sm, Er, and Tm. The structures and magnetic properties of Ln 2 Co 17-x Si x alloys, where Ln = Y, Ce, Pr, Nd, Gd, Ho, and Dy, have been investigated recently [1][2][3][4][5][6][7][8][9]. The binary compounds have the hexagonal Th 2 Ni 17 structure when Ln = Y, Ce, or Ho [1,2,6,7], whereas the rhombohedral Th 2 Zn 17 structure is observed when Ln = Pr, Nd, Gd, or Dy [3][4][5]8].…”

“…The structures and magnetic properties of Ln 2 Co 17-x Si x alloys, where Ln = Y, Ce, Pr, Nd, Gd, Ho, and Dy, have been investigated recently [1][2][3][4][5][6][7][8][9]. The binary compounds have the hexagonal Th 2 Ni 17 structure when Ln = Y, Ce, or Ho [1,2,6,7], whereas the rhombohedral Th 2 Zn 17 structure is observed when Ln = Pr, Nd, Gd, or Dy [3][4][5]8]. The same structures are exhibited by Ln 2 Co 17-x Si x pseudobinaries [1][2][3][4][5][6][7][8].…”

“…In some cases, for higher Si concentrations both structure types coexist (see e.g. [1,2,8]). Lately, it has been found that the substitution of Si for Co does not increase the Curie temperature, but for selected rare-earth elements it causes a change in the easy magnetization direction (EMD) from the basal plane to the c-axis [1,2,6].…”

“…However, for Ln = Gd, this transformation appears only at high temperature [5]. As a rule, the Co moment and the Curie temperature decrease with increasing Si concentration [1][2][3][4][5][6][7][8][9]. Such a regularity is not observed for alloys with Fe as the transition metal (see e.g.…”