Title :
Magnetic and crystal structure and magnetocrystalline anisotropy of hexagonal Fe60Ga40-xAsx (x= 6, 23) and FeGa23Sb17 compounds
Author :
Moze, O. ; Paoluzi, A. ; Pareti, L. ; Turilli, G. ; Vigneron, F. Bow ; Cockayne, B. ; Macewan, W.R. ; Greaves, C. ; Smith, N.A. ; Harris, I.R.
Author_Institution :
Dipartimento di Fisica, Parma Univ., Italy
fDate :
3/1/1994 12:00:00 AM
Abstract :
Powder neutron diffraction at 1.5 K has to investigate the crystal and magnetic structure, whilst the Singular Point Detection (SPD) technique has been used to measure the temperature and composition dependence of the magnetic anisotropy of Fe60Ga40-xAsx (x=6, 23) and FeGa23 Sb17. The compounds Fe60Ga17As 23 and FeGa23Sb17 are isotypic with Ni 2In (P63/mmc) and Fe60Ga34As 6 is a complex modification of this with a doubling of the lattice constant a of the parent Ni2In subcell. The neutron data show that the magnetic structures are planar at 1.5 K. Analysis of the SPD signals also indicates a planar anisotropy for all compositions at low temperatures. The temperature dependence of the anisotropy field HA is very similar for the Ga compounds whilst for the Sb compound a smoother dependence is observed at low temperatures. The anisotropy field increases irrespective of As or Sb substitution. The Curie point, saturation magnetization and anisotropy field can be simultaneously increased by changing the relative content of non-magnetic ions
Keywords :
Curie temperature; antimony alloys; arsenic alloys; crystal atomic structure of alloys; ferromagnetic properties of substances; gallium alloys; iron alloys; lattice constants; magnetic anisotropy; magnetic structure; neutron diffraction examination of materials; Curie point; Fe60Ga17As23; Fe60Ga34As6; Fe60Ga40-xAsx; Fe60Gal7As23; FeGa23Sb17; anisotropy field; crystal structure; lattice constant; magnetocrystalline anisotrop; powder neutron diffraction; saturation magnetization; Anisotropic magnetoresistance; Diffraction; Iron; Magnetic anisotropy; Neutrons; Perpendicular magnetic anisotropy; Powders; Saturation magnetization; Temperature dependence; Temperature measurement;
Journal_Title :
Magnetics, IEEE Transactions on
