Origin of elevated ordering temperature in MnFe2O4 nanometer particles

被引：13
|
作者：
Morrish, AH
Li, ZW
Zhou, XZ
机构：
[1] Department of Physics, University of Manitoba, Winnipeg
来源：
JOURNAL DE PHYSIQUE IV | 1997年 / 7卷 / C1期
关键词：
D O I：
10.1051/jp4:19971209
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Mossbauer spectra of MnFe2O4 with various particle sizes in a longitudinal 50 kOe magnetic field show that the Fe ion occupancy of the A and B crystallographic sites depends on the particle size. The elevated Neel temperatures with decreasing particle sizes are attributed to an increased iron occupancy on the A sites; this in turn leads to an increase in the total superexchange interaction.
引用
收藏
页码：513 / 516
页数：4
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