Structural and magnetic properties of Nd3(Fe1−xCox)27.7Ti1.3 (0<x≤0.4) alloys

Structural and magnetic properties of Y3(Fe1−Co )27.5V1.5 (0 ≤x≤ 0.4)

“…For higher Co concentration the phenomenon is reversed, the majority spin up band is filled up and the extra 3d electrons are put in the minority spin down band, resulting in the decrease of the mean 3d atomic magnetic moment. This is more obvious in cryogenic temperatures as it has been observed in the case of the isostructural compounds with Nd [4] and Tb, Dy [9]. At room temperature this effect is compensated by the increase in Curie temperature with Co, which delays the weakening of the 3d magnetic moments.…”

“…6 shows typical 57 Fe Mössbauer spectra, together with the theoretical fitting curves (solid lines), for the alloys under study at 293 K. The fitting procedure was based on the model suggested in Ref. [4] for Nd 3 (Fe 1 − x Co x ) 27.7 Ti 1.3 and taking into account the contribution of the 1:12 secondary phase. Bara et al have studied the 57 Fe Mössbauer spectra of YFe 11 − x Co x Ti [16].…”

“…The easy magnetization direction (EMD) has been found near the basal plane in terms of the 1:5 hexagonal description (the plane perpendicular to the [2 0 4] direction of the monoclinic unit cell) and almost in the direction of the b-axis of the monoclinic structure, which is lying on the same plane [1]. In the case of Nd 3 (Fe 1 − x Co x ) 27.7 Ti 1.3 compounds it has been found that the canted anisotropy (x = 0) turns gradually to uniaxial for x > 0.1, towards the [4 0 −2] direction which corresponds to the c-axis of the 1:12 phase and lies in the 1:5 basal plane [4]. Yang et al [5] and Wang et al [6] observed that for the case of Gd 3 (Fe 1 − x Co x ) 25 Cr 4 compounds the anisotropy is planar with the EMD also lying near to the [4 0 −2] direction.…”

“…In order to improve the understanding of the behavior of Co and Fe in R 3 (Fe, TM) 29 substituted alloys, several groups have studied the replacement of Fe by Co in this system synthesized with various rare earths [1][2][3][4][5][6][7][8][9]. It has been shown that the Curie temperature, the saturation magnetization, and the magnetocrystalline anisotropy of these compounds are strongly affected by the Co content.…”

Influences of Co on structural and magnetic properties of R3(Fe1−Co )29−M (R=rare earth metal, M=transition metal) intermetallic compounds

“…Recently, it has been shown that in 3:29 compounds Co substitution has a significant effect on their structural and magnetic properties, especially on the nature of the magnetocrystalline anisotropy. Normally, substituting Co for Fe up to 40% results in the formation of the corresponding 3:29 phase (R = Pr; M = Ti [3], R = Gd; M = Ti, Cr [4], R = Sm; M = Mo [5], R = Ce; M = Mo [6], R = Nd; M = Ti [7], R = Tb, Dy; M = V [8] and R = Y; M = V [9]). On the contrary, the synthesis of R 3 (Fe 1−x Co x ) 29−y M y with x > 0.4 has been proved to be possible only when using a large amount of stabilizing agent such as R = Gd, Cr with y = 4-7 [10] and R = Sm, M = Cr [11] with y = 4.5-7.…”