Investigation of (R1−xR′x)2(Fe,Co)17 powders by Mössbauer spectrometry

Structural and magnetic investigation of powders by Mössbauer spectrometry

“…This is in agreement with other studies [3,17]. It is worth to mention that the values obtained for the different sites and for the different samples do not indicate an influence of the rare-earth, as for the unnitrided samples [11].…”

“…The Mössbauer contribution of the nitrided phase has been fitted according to both the crystal structure and the magnetocrystalline anisotropy of the compounds, in agreement with what has been done for unnitrided (R 1−x R x )Fe 17−y Co y compounds [11].…”

“…In addition, as for the unnitrided Sm 2 Fe 17 sample [11], a central paramagnetic component was introduced for the spectrum of the Sm 2 Fe 17 N z sample to account for the extra absorption at the centre of the spectrum. This contribution could correspond to an R-Fe-O oxide or to a nanocrystalline R-Fe phase The Mössbauer spectrum of the NdGdFe 17 N z phase was fitted with seven sextets, namely: 18f 12 , 18f 6 , 18h 12 , 18h 6 , 9d 6 , 9d 3 and 6c, as for the unnitrided materials [11]. Indeed, the magnetization remains in the basal plane along the [1 0 0] axis in Nd 2 Fe 17 N x [9].…”

“…The Mössbauer spectra of the Nd 1.5 Gd 0.5 Fe 16 CoN z and Nd 2 Fe 16 CoN z phases were fitted with four sextets corresponding to the 18f, 18h, 9d, and 6c Fe sites, as for the unnitrided R 2 Fe 16 Co samples, with the same proportions for the different Fe sites [11].…”

“…The Mössbauer spectra of the corresponding unnitrided powders have been reported before [11]. The structure of the samples has been investigated by X-ray diffraction.…”