Structure and magnetic properties of Sm3(Fe, V)29NX

Abstract

The crystal structure and magnetic properties of Sm3(Fe, V)29NX compounds were investigated. It was found that the novel nitride, Sm3(Fe, V)29N2, is more stable than Sm3(Fe, V)29N4 in the atmosphere with low nitrogen pressure. The x-ray and electron diffraction studies show that the nitrides retain the same crystal structure as Sm3(Fe, V)29. The lattice parameters of Sm3(Fe, V)29N2 are a=1.084 nm, b=0.870 nm, c=0.985 nm, and β=97.06°.

Effect of Ga and Zr Substitution on the Properties of Dy2Fe17−XZrX and Dy2Fe16Ga1−xZrx (0 ≤ x ≤ 1) Intermetallic Compounds Prepared via Arc Melting Process

“…R 2 Fe 17 compounds were studied in late the 1970s, and the values of (BH) max and coercivity (Hc) were found to be about 26 MGOe and 15 kOe, respectively; however, they have low Curie temperature (~473 K for Gd 2 Fe 17 and~300 K for Dy 2 Fe 17 ) and low magnetic anisotropies [1]. Many studies were done to improve the Curie temperatures of Dy 2 Fe 17 [2][3][4] either by replacing the Fe atoms with non-magnetic atoms (Al, Si, Ga) [5] or by doping refractory atoms (Ti, V, Mo, Nb, W, Zr) in the Fe site [6][7][8][9][10]. It was also found that substitution of magnetic atoms (Co, Ni, Cr, Mn, Ni) [11] and non-metals (C, N, H) in the R 2 Fe 17 lattice also increased the Curie temperature of R 2 Fe 17 compounds [12][13][14][15].…”

Structural, Magnetic and Mössbauer Studies of Ga and Zr Doped Dy₂Fe_17-XZr_Xand Dy₂Fe₁₆Ga_1-xZr_x (x=0.00, 0.25, 0.50, 0.75, 1.00)

“…R2Fe17 compounds were studied in late the 1970s and the values of (BH)max and Coercivity (Hc) were found about 26 MGOe and 15 kOe respectively but they have very low Curie temperature (~473 K for Gd2Fe17 and ~300 K for Dy2Fe17) and low magnetic anisotropies [1]. Many researches have been done to improve the curie temperatures of Dy2Fe17 [2][3][4] either by replacing the Fe atoms with non-magnetic atoms (Al, Si, Ga) [5] or by doping refractory atoms (Ti, V, Mo, Nb, W, Zr) in Fe site [6][7][8][9][10]. It is also found that substitution of magnetic atoms such as (Co, Ni, Cr, Mn, Ni) [11], non-metals such as C, N, and H in R2Fe17 lattice also increase the curie temperature of R2Fe17 compounds.…”

Structural, magnetic and Mossbauer studies of TI doped Gd2Fe17−xTix and Gd2Fe16Ga1−xTix (0≤x≤1)

“…The presence of α-Fe, a soft magnetic phase, proves to be detrimental to the overall coercivity and thus energy-product of the magnet. It is known that proper amount of transition-metal (IVB/VB/VIB) group elements, such as Nb, Zr, Ti, V, Cr [22][23][24][25] substitutions reduce the amount of α-Fe phases via forming binary paramagnetic phases and stabilize various rare-earth-transition metal compounds. Keeping in view the beneficial effect of adding refractory element, in the present work, we report on a comparative study on the structural and magnetic properties of intermetallics type Gd 2 Fe 17 À x Ti x and Gd 2 Fe 16 Ga 1 À x Ti x compounds with x r1.…”