Growth, structural and magnetic characterization of Al-substituted barium hexaferrite single crystals

被引：48

作者：

Vinnik, D. A. ^{[1
]}

Zherebtsov, D. A. ^{[1
]}

Mashkovtseva, L. S. ^{[1
]}

Nemrava, S. ^{[2
]}

Bischoff, M. ^{[2
]}

Perov, N. S. ^{[3
,5
]}

Semisalova, A. S. ^{[3
]}

Krivtsov, I. V. ^{[1
]}

Isaenko, L. I. ^{[4
]}

Mikhailov, G. G. ^{[1
]}

Niewa, R. ^{[2
]}

机构：

[1] South Ural State Univ, Chelyabinsk 454080, Russia

[2] Univ Stuttgart, D-70569 Stuttgart, Germany

[3] Moscow MV Lomonosov State Univ, Moscow 119991, Russia

[4] Russian Acad Sci, Inst Geol & Mineral, Siberian Branch, Novosibirsk 630090, Russia

[5] Balt Fed Univ, Kaliningrad 236041, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 615卷

关键词：

Permanent magnets; Crystal growth; Crystal structure; Magnetization; FERRITE;

D O I：

10.1016/j.jallcom.2014.07.126

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Large single crystals of aluminum-substituted M-type barium hexaferrite BaFe12-xAlxO19 were obtained from carbonate flux. The Al content in the crystals can be controlled via the Al content of the flux up to x = 1.1 according to single crystal X-ray structure refinements. Al shows a distinct preference to substitute Fe on crystallographic sites with high coordination numbers by oxygen atoms, whereas no significant amounts of Al can be found on a tetrahedrally coordinated site. An increasing amount of the aluminum dopant results in a monotonous reduction of the Curie temperature from 440 to 415 degrees C and the saturation magnetization at room temperature from 68 to 57 emu/g for single crystal and from 61 to 53 emu/g for powder samples. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1043 / 1046

页数：4

共 22 条

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