STRUCTURAL AND MAGNETIC STUDIES OF BI2FE4-XALXO9

被引：33

作者：

GIAQUINTA, DM

PAPAEFTHYMIOU, GC

ZURLOYE, HC

机构：

[1] MIT, DEPT CHEM, CAMBRIDGE, MA 02139 USA

[2] MIT, FRANCIS BITTER NATL MAGNET LAB, CAMBRIDGE, MA 02139 USA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1995年 / 114卷 / 01期

关键词：

D O I：

10.1006/jssc.1995.1028

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The solid solution Bi2Fe4-xAlxO9 (0 less than or equal to x less than or equal to 4) was synthesized and investigated by powder X ray diffraction, Mossbauer spectroscopy, and magnetic susceptibility measurements. The structure of the x = 2 member was refined using the Rietveld method. The structure is orthorhombic with space group Pbam (No. 55), a = 7.8611(3) Angstrom, b = 8.2753(3) Angstrom, c = 5.8535(3) Angstrom. The aluminum in the structure substitutes in both available coordination geometries, octahedral and tetrahedral, with equal probability. Magnetic susceptibility and Mossbauer measurements of the materials with x less than or equal to 1 display antiferromagnetic behavior. The Neel temperature, T-N, exhibits a strong dependence on x, decreasing rapidly with aluminum doping. Spin-glass-like behavior is also observed for values of x greater than or equal to 0.6. (C) 1995 Academic Press, Inc.

引用

页码：199 / 205

页数：7

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