Mossbauer analysis of Nd-Co M-type strontium hexaferrite powders with different iron content

被引：21
作者：
Herme, Carlos [1 ,2 ]
Jacobo, Silvia E. [1 ,2 ]
Bercoff, Paula G. [3 ,4 ]
Arcondo, Bibiana [1 ,2 ]
机构：
[1] Univ Buenos Aires, Fac Ingn, Buenos Aires, DF, Argentina
[2] Univ Buenos Aires, CONICET, INTECIN, Buenos Aires, DF, Argentina
[3] Univ Nacl Cordoba, Fac Matemat Astron & Fis, RA-5000 Cordoba, Argentina
[4] Consejo Nacl Invest Cient & Tecn, IFFAMAF, Cordoba, Argentina
来源：
HYPERFINE INTERACTIONS | 2010年 / 195卷 / 1-3期
关键词：
Strontium hexaferrites; Nd-Co substitution; Non-stoichiometric hexaferrite; MAGNETIC-PROPERTIES; FERRITES;
D O I：
10.1007/s10751-009-0121-7
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The structural analysis of strontium hexaferrites SrFexO19 (for x = 12, 11 and 10) and substituted samples Sr0.7Nd0.3Fe12-yCo0.3O19 (for y = 0.3, 1.3 and 2.3) prepared through the citrate precursor method is shown. Nd and Co substitution modifies saturation magnetization (M-S) and increases coercivity (H-c) in samples heat-treated at 1100 degrees C for two hours. Mossbauer analyses show different iron occupancy and the influence of the Fe3+ content is particularly emphasized. Hematite segregation is observed for some compositions. Samples with low Fe3+ content show the best magnetic properties with no secondary phase segregation.
引用
收藏
页码：205 / 212
页数：8
相关论文
共 13 条
  • [1] In-situ high-temperature X-ray diffraction studies of non-stoichiometric Ni-Zr substituted barium hexagonal ferrites prepared by citrate precursor route
    Bahadur, D
    Fischer, W
    Rane, MV
    [J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1998, 252 (01): : 109 - 116
  • [2] Brand R.A., 1990, NORMOS PROGRAMS
  • [3] FE-57 HYPERFINE INTERACTION PARAMETERS AND SELECTED MAGNETIC-PROPERTIES OF HIGH-PURITY SRFE12O19, BAFE12O19
    EVANS, BJ
    GRANDJEAN, F
    LILOT, AP
    VOGEL, RH
    GERARD, A
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1987, 67 (01) : 123 - 129
  • [4] Wave propagation in ferrite involving planar anisotropy - Theory and experiment
    How, HT
    Zu, X
    Vittoria, C
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 2005, 41 (08) : 2349 - 2354
  • [5] Jacobo S.E., 2009, J ALLOYS CO IN PRESS
  • [6] Jonker H., 1956, PHIL TECH REV, V18, P145
  • [7] LaCo-substituted ferrite magnets, a new class of high-grade ceramic magnets;: intrinsic and microstructural aspects
    Kools, F
    Morel, A
    Grössinger, R
    Le Breton, JM
    Tenaud, P
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2002, 242 : 1270 - 1276
  • [8] Influence of the presence of Co on the rare earth solubility in M-type hexaferrite powders
    Lechevallier, L.
    Le Breton, J. M.
    Morel, A.
    Tenaud, P.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 316 (02) : E109 - E111
  • [9] Mossbauer investigation of Sr1-xLaxFe12-yCOyO19 ferrites
    Lechevallier, L
    Le Breton, JM
    Teillet, J
    Morel, A
    Kools, F
    Tenaud, P
    [J]. PHYSICA B-CONDENSED MATTER, 2003, 327 (2-4) : 135 - 139
  • [10] The influence of heat-treatment on microstructure and magnetic properties of rare-earth substituted SrFe12O19
    Rezlescu, N.
    Doroftei, C.
    Rezlescu, E.
    Popa, P. D.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 451 (1-2) : 492 - 496
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