Structure and magnetic properties ofRFe11.35Nb0.65and

Anomalies in magnetoelastic properties of DyFe11.2Nb0.8 compound

“…The Fe-sublattice has a uniaxial magnetic anisotropy parallel to the c-axis whereas the Dy sublattice has basal-plane anisotropy, mainly as a consequence of the negative second-order Stevens coefficient of Dy 3þ . 1,2 At low temperatures, the Dy-sublattice anisotropy is dominant but with increasing temperature the axial anisotropy of the Fe-sublattice becomes dominant, due to the rapid decrease in the Dysublattice anisotropy with increasing temperature. 1 The competing anisotropy contributions from the two sublattices can therefore lead to spin reorientation transitions.…”

“…As an example, they are found to exhibit different easy magnetization directions and spin-reorientation transitions depending on the rare-earth element. 1,2 In RFe 12Àx T x compounds, the R atoms are located at the 2a site and the Fe atoms occupy three nonequivalent sites (8f, 8i, and 8j) with T atoms (if 3d) also sitting at 8i sites. 1,3 For the DyFe 12Àx T x compounds, it is well accepted that the total magnetocrystalline anisotropy results from the contributions of both the Dy and Fe sublattices.…”

“…1,2 In RFe 12Àx T x compounds, the R atoms are located at the 2a site and the Fe atoms occupy three nonequivalent sites (8f, 8i, and 8j) with T atoms (if 3d) also sitting at 8i sites. 1,3 For the DyFe 12Àx T x compounds, it is well accepted that the total magnetocrystalline anisotropy results from the contributions of both the Dy and Fe sublattices. The Fe-sublattice has a uniaxial magnetic anisotropy parallel to the c-axis whereas the Dy sublattice has basal-plane anisotropy, mainly as a consequence of the negative second-order Stevens coefficient of Dy 3þ .…”

“…[1][2][3] and in recent decades have attracted significant interest due to their potential application as permanent magnets. As an example, they are found to exhibit different easy magnetization directions and spin-reorientation transitions depending on the rare-earth element.…”

Magnetic properties of Y(Fe0.8M0.2)11.3Nb0.7 compounds with M=Mn, Fe, Co, Ni, Al, and Ga

“…For instance, it has been found 2 that Sm 3 ͑Fe,Ti͒ 29 N y exhibits potentially interesting permanent magnet properties. Recently Hu et al 3 have found that the ThMn 12 structure can be stabilized with a small amount of Nb ͑xϭ0.65͒. A small amount of stabilization element is of interest, since in this case the magnetization is only slightly reduced, which may result in an improvement of the performance.…”