The effect of Zr addition on the formation and structural properties of 3:29 compounds in the Fe–Nd–Ti–Zr system

A new series of 3:29 compounds in the Fe–Nd–Ti–Zr quaternary system were synthesized successfully. The formation and structural properties were studied by means of powder x-ray and powder neutron diffraction. The results reveal that only a small amount of Zr content can exist in the 3:29-type compounds in the Fe–Nd–Ti–Zr quaternary system. Higher Zr content induces the formation of rhombohedral Th2Zn17-type phase. In the structures of 3:29-type compounds, the Zr content partially substitutes for Nd and enters the 2a and 4i crystallographic sites exclusively. Upon Zr substitution, the lattice parameters a, b, c and the unit cell volumes V of (Nd,Zr)3(Fe,Ti)29 compounds decrease monotonically and their intrinsic magnetic properties, including the Curie temperature and saturation magnetization, lessen as well.

[1]  Yingchang Yang,et al.  Determination of the zirconium site in zirconium-substituted Nd(Fe,Mo,Zr)12 compounds , 2004 .

[2]  G. Hadjipanayis,et al.  Synthesis and magnetic properties of (R,R′)3(Fe,Ti)29 (R=Pr, Nd and R′=Sm, Er) intermetallic compounds , 2003 .

[3]  F. D. Boer,et al.  Structural and magnetic properties of (Nd1−xTbx)3Fe27.31Ti1.69 (0⩽x⩽1.0) compounds , 2002 .

[4]  Guangheng Wu,et al.  Structural and magnetic properties of (Nd1-xRx)3Fe27.31Ti1.69 compounds with R = Dy and Er , 2001 .

[5]  M. McHenry,et al.  Microstructural characterization of (Fe0.5Co0.5)88Zr7B4Cu1 nanocrystalline alloys , 2001 .

[6]  D. Sellmyer,et al.  Magnetic and structural properties of Nd2Fe17−xMx (M=Cu, Cr, V, Nb, and Zr) compounds , 2000 .

[7]  D. Niarchos,et al.  Phase diagram and magnetic properties of Nd3−xDyx(Fe,Ti)29 (0.1 , 2000 .

[8]  Fuqiang Huang,et al.  Structure and magnetic properties of intermetallic compounds (Gd1-xRx)3Fe28Nb (R = Ce, Nd, Sm) , 2000 .

[9]  M. McHenry,et al.  Study of structural and magnetic properties and exchange interactions in (Y1−xGdx)3Fe27.5Ti1.5 [x=0, 0.2, 0.5, 0.8, 1.0] , 1999 .

[10]  P. Mcguiness,et al.  Magnetic properties and microstructure in NdDyFeBZr–HDDR , 1998 .

[11]  G. Hadjipanayis,et al.  Effects of substitutions M on the formation, structure and magnetic properties of Sm2Fe15M2C2 (M = V, Cr, Ti, Nb, Zr, Mn and Mo) compounds , 1998 .

[12]  F. Yang,et al.  Synthesis and magnetic properties of novel compounds R3(Fe, T)29 (R=Y, Ce, Nd, Sm, Gd, Tb, and Dy; T=V and Cr) , 1997 .

[13]  Z. Hu,et al.  Site occupancy and lattice changes on nitrogenation in Nd3Fe29−xTixNy , 1996 .

[14]  Z. Hu,et al.  Neutron diffraction analysis of Nd3Fe29−xTx (T=Ti, Cr, Mn) , 1996 .

[15]  D. Niarchos,et al.  Existence range, structural and magnetic properties of Nd3Fe27.5Ti1.5−yMoy and Nd3Fe27.5Ti1.5−yMoyNx (0.0 ≤ y ≤ 1.5) , 1995 .

[16]  F. Pinkerton,et al.  Structural and magnetic properties of R3(Fe,T)29 compounds , 1994 .

[17]  J. Cadogan,et al.  Magnetic properties of interstitially modified Nd3(Fe,Ti)29Xy compounds (X=H, C, and N) , 1994 .

[18]  J. García,et al.  Structural and magnetic characterization of the new ternary phase Tb3(Fe1−xTix)29 , 1994 .

[19]  J. Cadogan,et al.  Magnetic properties of R3(Fe,Ti)29Cy carbides (R=Nd, Sm) , 1994 .

[20]  J. Cadogan,et al.  Magnetic properties of a novel Sm3(Fe,Ti)29Ny nitride , 1994 .

[21]  J. Cadogan,et al.  Structural properties of a novel magnetic ternary phase: Nd3(Fe1−xTix)29 (0.04 ≤ x≤ 0.06) , 1994 .

[22]  D. Givord,et al.  Magnetic transition and anomalous thermal expansion in R 2 Fe 17 compounds , 1974 .