High field magnetization and spin reorientation in Sm2(Fe1−Al )17 single crystals

Magnetic anisotropy in Sm2Fe17Nx (0<x<3) of intermediate nitrogen concentrations

“…In the case of the Sm 2 Fe 17 alloy, however, no reliable value of CEF parameters was reported, mainly because of the difficulty of obtaining good crystals. If we extrapolate the A 0 2 value in Sm 2 (Fe 1−x Al x ) 17 [13] to x = 0, then we expect a small positive A 0 2 value for Sm 2 Fe 17 alloy which results in the cplane anisotropy. In view of a point-charge approximation, the a-axis expansion destabilize the c-plane anisotropy, since the distance between Sm ions in the c-plane increases, which reduces the gain of Coulomb interaction between Sm's 4f orbital and the neighboring positive charge of Sm 3+ .…”

Crystal Growth of Magnetic Materials

“…The substitution of Si for Fe leads to the reduction of lattice parameters and a significant increase of the Curie temperature from 413 to 526 K. Alternatively, Dy 2 Fe 17 (Coelho, Mohan, Gama and Kronmüller, 1996) and substituted Sm 2 (Fe 1 -x Al x ) 17 (Kato et al, 1995) compounds were also grown with the Bridgman method. High pressures (1 MPa) of Ar and BN coated alumina crucibles were utilized for the growth of substituted Sm 2 (Fe 1 -x Al x ) 17 single crystals (Kato et al, 1995). Some amounts of A1 were found to be transferred from the crucible to the sample, due to an appreciable reaction between Al 2 O 3 and Sm.…”

Functional intermetallic compounds in the samarium–iron system

“…In the Sm-Fe system, the existence of stoichiometric compounds with compositions of Sm 2 Fe 17 (Th 2 Zn 17 -type), SmFe 3 (PuNi 3 -type), SmFe 2 (MgCu 2 -type), and Sm 6 Fe 23 (Th 6 Mn 23 ) has been reported [3,4]. Although the magnetism of Sm 2 Fe 17 has been studied thoroughly using single crystal specimen [5], magnetism of other compounds has not been clarified because of the difficulty in obtaining single crystal specimens. It is widely accepted that the magnetic properties of ferromagnetic materials strongly depend on their crystallographic direction.…”