Open AccessSTRUCTURAL AND MAGNETIC PROPERTIES OF Gd Fe Co Ga COMPOUNDS WITH 2∶17 TYPE STRUCTURE
Author(s) -
Ligang Zhang,
Shaoying Zhang,
Hongwei Zhang
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.2241
Subject(s) - curie temperature , magnetocrystalline anisotropy , materials science , arc melting , magnetization , analytical chemistry (journal) , saturation (graph theory) , magnetic anisotropy , crystallography , condensed matter physics , nuclear magnetic resonance , microstructure , chemistry , ferromagnetism , magnetic field , metallurgy , physics , mathematics , combinatorics , chromatography , quantum mechanics
The compounds of Gd2Fe1-xCox15Ga2(0≤x≤1.0) and Gd2Fe0.8Co0.217-yGay(0≤y≤8) were prepared by arc melting. Their structure and magnetic properties have been studied by means of X ray diffraction and magnetic measurements. Experimental results show that single phase compounds with the 2∶17-type structure were obtained for all samples. It was found that the unit cell volume of Gd2Fe1-xCox15Ga2 compounds decreases, while the Curie temperature Tc increases monotonously with increasing Co concentration. The saturation magnetization Ms at 1.5K first increases with increasing x, then decreases, showing a value of maximum at x=0.2. For Gd2Fe0.8Co0.217-yGay,the unit cell volume increases, the Curie temperature and the saturation magnetization at 1.5K decrease monotonously with increasing Ga content. The substitution of Co or Ga for Fe in Gd2Fe17 compounds results in a change of magnetocrystalline anisotropy of Fe or Co sublattice from easy plane to easy c-axis at room temperature. This is likely related to the preferential site occupancy of Ga atom.