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

页码：205 / 212

页数：8

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