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
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