Structure and magnetic properties of Gd4(Co,Ti)41 alloys

被引：2
作者：
Gjoka, M.
Sarafidis, C.
Niarchos, D.
Kalogirou, O.
机构：
[1] NCSR Demokritos, Inst Mat Sci, Athens 15310, Greece
[2] Aristotle Univ Thessaloniki, Dept Phys, Thessaloniki 54124, Greece
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2006年 / 423卷 / 1-2期
关键词：
intermetallics; permanent magnets; powder metallurgy; X-ray diffraction; magnetic measurements;
D O I：
10.1016/j.jallcom.2005.12.035
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Series of intermetallic compounds are usually obtained by the general formula Rm-nT5m+2n, i.e., taking m RT5 unit cells and replacing 11 R atoms by T-T pairs. The combination (m,n) = (7,3) which corresponds to R4T41 has not been reported yet. In this work we have investigated the possibility to synthesize the Gd4Co41-xTix compounds by annealing the stoichiometric as-cast samples in the temperature interval of 1133-1438 K. The Gd4Co39Ti2 alloy annealed at 1133 K crystallizes into the disordered TbCu7-type structure. The saturation magnetization M-s of this sample is 77.3 Am-2/kg at room temperature and the alloy exhibits uniaxial anisotropy. The Gd4Co39Ti2 alloy annealed at 1438 K crystallizes into the disordered Th2Ni17-type hexagonal phase (2:17H) with cell parameters a = 8.350(1) and c = 8.224(1) angstrom. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：59 / 61
页数：3
相关论文
共 12 条
  • [1] INTERMETALLIC COMPOUNDS IN GADOLINIUM-COBALT SYSTEM
    BUSCHOW, KHJ
    VANDERGO.AS
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1969, 17 (03): : 249 - &
  • [2] CADOGAN JM, 2000, P 11 INT S MAGN AN C, pS3
  • [3] CJOKA M, 2002, P 17 INT WORKSH RAR, P216
  • [4] New phases in Tb-Fe-Si system
    Ivanova, GV
    Makarova, GM
    Shcherbakova, YV
    Belozerov, YV
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2000, 309 (1-2) : 141 - 146
  • [5] JOHNSON Q, 1968, UCRL71094 LAWR RAD L
  • [6] CRYSTAL-STRUCTURES OF R2CO17 INTERMETALLIC COMPOUNDS
    KHAN, Y
    [J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1973, 29 (NOV15): : 2502 - +
  • [7] Ab initio crystal structure solution of the novel intermetallic compound Nd-3(Fe,Ti)(29)
    Psycharis, V
    Kalogirou, O
    Niarchos, D
    Gjoka, M
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1996, 234 (01) : 62 - 66
  • [8] Phase stability, structure and magnetic properties of R3(Fe,TM)29, (R=Gd, Dy, Er, Y and TM=V, Ti) compounds with disordered structures
    Psycharis, V
    Gjoka, M
    Christides, C
    Niarchos, D
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2001, 317 : 455 - 458
  • [9] STADELMAIER HH, 1984, Z METALLKD, V75, P227
  • [10] RARE EARTH-TRANSITION METAL PERMANENT-MAGNET MATERIALS
    WALLACE, WE
    [J]. PROGRESS IN SOLID STATE CHEMISTRY, 1985, 16 (03) : 127 - 162
12