Effect of interstitial hydrogen and nitrogen on magnetic and structural properties of R2T17 (R ≡ Y, Ce and Sm; T ≡ Fe, Co and Ni)

Structural, magnetic and thermal properties of intermetallics Nd3Fe27−xCoxV2 (x=0, 2 and 4) and their hydrides

“…These results are in agreement with the reported literature results based on the hypothesis that hydrogen atoms mainly occupy 4i and 4f sites with the A2/m space group which are located in the basal plane referred to 1:5 cell [4]. A similar anisotropic lattice expansion has been reported for 2:17 and 1:12 hydrides and nitrides [13,14] as well as 3:29 hydrides [5]. Fig.…”

Magnetic phase diagrams of Ce2Fe17−xMnx–H system: A magnetization study

“…It can be positive or negative, but its sign is determined by the atomic distances between these planes [12]. When this distance increases upon hydrogenation [13,14] the exchange interaction becomes positive and ferromagnetic couplings prevails in the hydride with y ≥> 2.…”

Giant magnetoresistance inCe2Fe17

“…A similar M -B curve was observed between 125 K and T N ϭ215 K. Until now, the magnetization of Ce 2 Fe 17 has been measured by two different authors. 6,7 Both results indicate a small but finite ferromagnetic component in the sample, which might be due to a small segregation of an ␣-Fe phase. So, we believe that our sample is the best among the previous samples that have been reported so far.…”

“…5 Hence, nobody has made systematic studies on the physical properties for Ce 2 Fe 17 . Only a few works have been independently studied by measurements of magnetization, 6,7 Mössbauer effect, 8 specific heat, 9 x-ray absorption, 10 and neutron diffraction. 11…”