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  • American Institute of Physics (AIP)  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Structure and magnetic properties of Sm2(Fe1−xAlx)17Ny compounds : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5890-5892 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By means of x-ray phase analysis, it is shown that all the interstitial Sm2(Fe1−xAlx)17Ny nitrides and the parent compounds crystallize in Th2Zn17-type structure for x≤0.4. The lattice constants of the parent compounds increase linearly with Al concentration. The introduction of nitrogen leads to a further increase in lattice constants, but the amplitude of the increase decreases with increasing Al concentration. The introduction of nitrogen leads to an increase of Curie temperature Tc . The composition dependence of Tc of the parent compounds exhibits a maximum, whereas Tc of the nitride decreases monotonously with increasing Al concentration from 750 K for x=0 to 313 K for x=0.4. The mean magnetic moments of iron ions in both nitrides and parents decrease monotonously with increasing Al concentration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353512
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  • 2
    Electronic Resource
    Electronic Resource
    The magnetic properties of R2(Fe1−xSix)17 compounds (R=Dy, Y) (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 7452-7455 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structures and magnetic properties of R2(Fe1−xSix)17 compounds (R=Dy, Y) were investigated by x-ray phase analysis and magnetic measurements. It is shown that Si substitution for Fe leads to a phase transition at x=0.2, and that the mean iron magnetic moment μFe of R2(Fe1−xSix)17 compounds (R=Dy, Y) decreases as Si concentration x increases; moreover, there is a maximum of dependence Tc(x) at about x=0.16. It is found that the exchange interaction constant AFeFe in R2(Fe1−xSix)17 compounds (R=Dy, Y) increases with x increasing by means of mean-molecular-field analysis of Tc. © 1994 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357972
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic properties of (Er,R)2Fe17Ny compounds (R=Y,Gd) : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6238-6240 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Structural and magnetic properties of the interstitial (Er1−xRx)2Fe17Ny compounds with R=Y and Gd, x=0, 0.1, 0.25, 0.4, 0.5, 0.6, 0.75, and 1.0, 2〈y〈3, have been investigated. All the parent compounds crystallize in the Th2Ni17-type structure, except for Gd2Fe17 which crystallizes in the Th2Zn17-structure. All nitrides preserve the same structure as the parents. Introduction of nitrogen results in an increase in lattice constants a and c, and the expansion of unit-cell volume is about 6%. The Curie temperature was found to increase distinctly after nitrogenation. Nitrogen absorption leads to an increase in saturation magnetization, the values of the saturation magnetization increase monotonically with increasing Y or Gd concentration. Nitrogenation increases the uniaxial anisotropy of the Er sublattice, and causes a spin reorientation. The Y and Gd concentration dependencies of the spin reorientation temperature Tsr exhibit maxima. The tentative spin phase diagrams are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355410
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  • 4
    Electronic Resource
    Electronic Resource
    Magnetic properties of Er2Fe17−xAlxNy compounds : 38th Annual Conference on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 6241-6243 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Structural and magnetic properties of the Er2Fe17−xAlxNy compounds (0≤x≤3) have been investigated. All nitrides and parent compounds crystallize in the Th2Ni17 structure. Al substituted for Fe leads to an increase in lattice constants a and c. Introduction of nitrogen results in a further increase of lattice constants, but the magnitude of this increase is smaller for increasing x. As Al content increases, the Curie temperature of the parent compound increases, whereas the Curie temperature of the nitride decreases. The substitution of Al for Fe results in a decrease of Fe moment in both nitrides and parent compounds. Introduction of nitrogen leads to an increase in the uniaxial anisotropy of the Er sublattice and a spin reorientation. A tentative spin phase diagram has been constructed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355411
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