New insights into the magnetic properties of the Ca2Fe2O5 ferrite

被引：22

作者：

Azzoni, Carlo B.

Mozzati, Maria Cristina

Massarotti, Vincenzo

Capsoni, Doretta

Bini, Marcella

机构：

[1] Univ Pavia, Dipartimento Fis A Volta, CNISM, I-27100 Pavia, Italy

[2] Univ Pavia, Dipartimento Chim Fis M Rolla, I-27100 Pavia, Italy

来源：

SOLID STATE SCIENCES | 2007年 / 9卷 / 06期

关键词：

Ca2Fe2O5; ferrite; EPR; XRPD; magnetization; cation doping;

D O I：

10.1016/j.solidstatesciences.2007.04.013

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Ca2Fe2O5 powder samples, undoped and doped with Na+, Mg2+, Al3+, Ti4+, Ge4+, were prepared with different synthesis routes to investigate the origin of the weak ferromagnetic component reported in literature for calcium ferrite single crystals. XRPD and EPR measurements have shown the presence of Fe3O4 magnetite as impurity phase in all the samples. This ferrimagnetic phase deeply influences the magnetic behavior with features very similar to those reported in literature for Ca2Fe2O5, both powders and single crystals. Our results support the hypothesis that the weak ferromagnetic component observed in Ca2Fe2O5 can be also due to the presence of magnetite impurity traces in the samples. (C) 2007 Elsevier Masson SAS. All rights reserved.

引用

页码：515 / 520

页数：6

共 24 条

[1] MAGNETIZATION AND EXCHANGE IN NONSTOICHIOMETRIC MAGNETITE [J].