NEUTRON-DIFFRACTION STUDY OF CRYSTAL AND MAGNETIC-STRUCTURES OF BATI0.6MG0.6FE10.8O19 AND BATI2CO2FE8O19

被引：24

作者：

KALVODA, L ^{[1
]}

DLOUHA, M ^{[1
]}

VRATISLAV, S ^{[1
]}

JIRAK, Z ^{[1
]}

机构：

[1] INST PHYS, PRAGUE, CZECHOSLOVAKIA

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1990年 / 87卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(90)90221-B

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two single-crystal samples of the barium hexaferrite with partial substitution of Fe3+ ions by Ti4+ + Mg2+ and Ti4+ + Co2+, respectively, have been investigated at ambient and cryogenic temperatures by the neutron diffraction. A break of the extinction law of group P63/mmc was observed irrespective the temperature. The structure was refined within the trigonal P3m1 symmetry. At the room temperature, the samples display a slightly canted modification of the Gorter-type ferrimagnetism with the easy-axis anisotropy for BaTi0.6Mg0.6Fe10.8O19 and the easy-cone anisotropy for BaTi2Co2Fe8O19. The later type is related to the one-ion contribution of Co2+ ions in octahedral sites. Conical-spiral arrangements of the block-type are established at low temperature. © 1990.

引用

页码：243 / 249

页数：7

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