The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied cry...The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied crystallize in ThMn 12 type of structure. The lattice constants and unit cell volume increase monotonously with increasing Mn concentration. The Curie temperature and the moments of the transition metal sublattice of HoFe 12- x Mn x compounds decrease monotonously with increasing Mn content. A minimum appears at x =3 0 in the Mn concentration dependence of the saturation magnetization of HoFe 12- x Mn x compounds. A compensation point appears in the M(t) curve of the compound with x =4 0. The mean field constant n RT of HoFe 9Mn 3 was calculated.展开更多
The effect of Mn substitution for partial Fe in RFe 11Ti on structure and magnetic properties of compounds was researched. RFe 7Mn 4Ti samples (R=Y,Tb,Dy,Ho,Er) were prepared by means of vacuum arc-melting and s...The effect of Mn substitution for partial Fe in RFe 11Ti on structure and magnetic properties of compounds was researched. RFe 7Mn 4Ti samples (R=Y,Tb,Dy,Ho,Er) were prepared by means of vacuum arc-melting and subsequent vacuum annealing. The structure and magnetic properties of RFe 7Mn 4Ti compounds were investigated by X-ray powder diffraction and magnetic measurements. The following conclusions were obtained: all the RFe tMn 4Ti compounds crystallize in the ThMn 12-type structure. The lattice constants and the unit-cell volume changed with the increase of atomic number for R=Y, Tb, Dy, Ho, and Er. The compensation characters appear for the DyFe 7Mn 4Ti and HoFe 7Mn 4Ti compounds, and the compensation temperatures were about 123 K and 90 K, respectively. The Curie temperature, the saturation magnetization, and saturation moment of RFe 7Mn 4Ti compounds were given.展开更多
The structure and magnetic properties of the intermetallic compounds Y(Fe 1- x Co x ) 11.3 Nb 0.7 ( x =0, 0 05, 0 1, 0 2) were studied by X ray diffraction and magnetic property measurements. ...The structure and magnetic properties of the intermetallic compounds Y(Fe 1- x Co x ) 11.3 Nb 0.7 ( x =0, 0 05, 0 1, 0 2) were studied by X ray diffraction and magnetic property measurements. X ray diffraction patterns and thermomagnetic curves show that all compounds almost exhibit single phase. All Y(Fe 1- x Co x ) 11.3 Nb 0.7 compounds ( x =0, 0 05, 0 1, 0 2) crystallize in ThMn 12 type structure. Substitution of Co for Fe leads to a clear increasing of Curie temperature and a monotonic decreasing of lattice constants. At room temperature the composition dependence of saturation magnetization exhibits a maximum at about x =0 1～0 2. The magnetocrystalline anisotropy field at room temperature at first increases and then decreases with the increasing of Co content.展开更多
文摘The effect of substitution of Mn on the structure and magnetic properties of HoFe 12- x Mn x (x =2 0, 3 0, 4 0 and 5 0) compounds was investigated. All the HoFe 12x Mn x compounds studied crystallize in ThMn 12 type of structure. The lattice constants and unit cell volume increase monotonously with increasing Mn concentration. The Curie temperature and the moments of the transition metal sublattice of HoFe 12- x Mn x compounds decrease monotonously with increasing Mn content. A minimum appears at x =3 0 in the Mn concentration dependence of the saturation magnetization of HoFe 12- x Mn x compounds. A compensation point appears in the M(t) curve of the compound with x =4 0. The mean field constant n RT of HoFe 9Mn 3 was calculated.
文摘The effect of Mn substitution for partial Fe in RFe 11Ti on structure and magnetic properties of compounds was researched. RFe 7Mn 4Ti samples (R=Y,Tb,Dy,Ho,Er) were prepared by means of vacuum arc-melting and subsequent vacuum annealing. The structure and magnetic properties of RFe 7Mn 4Ti compounds were investigated by X-ray powder diffraction and magnetic measurements. The following conclusions were obtained: all the RFe tMn 4Ti compounds crystallize in the ThMn 12-type structure. The lattice constants and the unit-cell volume changed with the increase of atomic number for R=Y, Tb, Dy, Ho, and Er. The compensation characters appear for the DyFe 7Mn 4Ti and HoFe 7Mn 4Ti compounds, and the compensation temperatures were about 123 K and 90 K, respectively. The Curie temperature, the saturation magnetization, and saturation moment of RFe 7Mn 4Ti compounds were given.
文摘The structure and magnetic properties of the intermetallic compounds Y(Fe 1- x Co x ) 11.3 Nb 0.7 ( x =0, 0 05, 0 1, 0 2) were studied by X ray diffraction and magnetic property measurements. X ray diffraction patterns and thermomagnetic curves show that all compounds almost exhibit single phase. All Y(Fe 1- x Co x ) 11.3 Nb 0.7 compounds ( x =0, 0 05, 0 1, 0 2) crystallize in ThMn 12 type structure. Substitution of Co for Fe leads to a clear increasing of Curie temperature and a monotonic decreasing of lattice constants. At room temperature the composition dependence of saturation magnetization exhibits a maximum at about x =0 1～0 2. The magnetocrystalline anisotropy field at room temperature at first increases and then decreases with the increasing of Co content.
