Mossbauer and FT-IR studies on non-stoichiometric barium hexaferrites

被引：105

作者：

Rane, MV

Bahadur, D ^{[1
]}

Nigam, AK

Srivastava, CM

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Bombay 400076, Maharashtra, India

[2] Tata Inst Fundamental Res, Bombay 400001, Maharashtra, India

[3] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra, India

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 192卷 / 02期

关键词：

non-stoichiometry; hexaferrite; Mossbauer; FT-IR; magnetic properties;

D O I：

10.1016/S0304-8853(98)00533-2

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

The site occupation of the cations in non-stoichiometric Ni-Zr substituted barium ferrite BaFe12-2xNi0.63xZr0.50xO19-delta (0 less than or equal to x less than or equal to 0.5) has been investigated using Mossbauer and FT-IR spectroscopy to examine its influence on magnetic properties (sigma(s), T-c, K-1, etc.). It is observed that maximum substitution of Zr occurs in the 2b and 4f(1) sites for small values of x (x similar to 0.1). Ni substitutes Fe on the 4f(2) site but, for larger x it mostly occupies the 12k site. The variations of isomer shift, hyperfine field and quadrupole splitting with substitution are related to changes in lattice constant, grain size and site occupancy of substituted ions. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：288 / 296

页数：9

共 19 条

[1]

In-situ high-temperature X-ray diffraction studies of non-stoichiometric Ni-Zr substituted barium hexagonal ferrites prepared by citrate precursor route [J].