High field magnetization and spin reorientation in Sm-2(Fe1-xAlx)(17) and Nd-2(Fe1-xAlx)(17) single crystals

High field magnetization measurements have been performed for single crystals of R(2)(Fe1-xAlx)(17) with R = Sm and Nd. The magnetization along the c-axis has been found to show a small spontaneous component, indicating that the total magnetization vector is not within the c-plane but in the plane spanned by the b- and c-axes. The angle between the magnetization direction and the b-axis increases linearly with increasing x in the Sm system. The results are analyzed on the basis of the crystalline electric field theory.