No abstract

The effect of Mn on structure and magnetic properties of Tb2Fe17−xMnx compounds has been investigated. Substitution of Mn for Fe does not change the structure of Tb2Fe17. All compounds crystallize in the Th2Ni17-type structure. The Curie temperature of Tb2Fe17−xMnx compounds decreases monotonically with increasing Mn content. The saturated magnetic moment and the magnetic moment of the transition metal sublattice of the Tb2Fe17−xMnx compounds decrease with increasing Mn concentration. A point without zero moment similar to the compensation point was observed in the temperature dependence of magnetization for the Tb2Fe17−xMnx compound with x=4.0, which is explained by a three-sublattice model.

Magnetic properties D 9000Structure and Magnetic Properties of TbFe11-xMnxTi Compounds. -TbFe 11-x Mn x Ti samples with x = 1.0, 2.0, 3.0, 4.0, and 5.0 are prepared by arc melting of the elements followed by annealing at 1123 K (50 h). All the compounds crystallize in the ThMn12-type structure (powder XRD). The unit-cell volume increases monotonically with increasing Mn concentration. A compensation temperature occurs in the magnetization-temperature curves of TbFe7Mn4Ti and TbFe6Mn5Ti. With increasing Mn concentration, the saturation magnetization at 4.4 K decreases to zero, and then increases again. The magnetic moment of the transition metal sublattice of the compounds decreases monotonically with increasing Mn content. -(YANG*, S.-Q.; ZHANG, C.-L.; LIN, P.-H.; LI, L.-X.; J. Alloys Compd. 473 (2009) 1-2, 280-282; Coll. Mater. Sci. Eng., Hunan Univ.,