Magnetic and fluorescence properties of cerium-doped yttrium gadolinium aluminum iron garnet crystals

被引：11

作者：

Aoki, Daichi ^{[1
]}

Shima, Mutsuhiro ^{[1
]}

机构：

[1] Gifu Univ, Dept Mat Sci & Technol, Gifu 5011193, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2014年 / 53卷 / 11期

关键词：

LIGHT-SCATTERING; SITE OCCUPANCY; FILMS; PHOSPHORS; POWDERS; IONS; YIG; GD;

D O I：

10.7567/JJAP.53.113001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic and fluorescence properties of chemically synthesized Ce:Gd-YAIG (Ce0.05GdxY2.95-xAl5-yFeyO12) nanocrystals have been investigated. The structural characterization by X-ray diffraction (XRD) shows that a garnet phase has been identified in samples with 0 <= x <= 2.95 and 0 <= y <= 3.0. When y = 0, only garnet peaks are observed for 0 <= x <= 2.5, while both garnet and perovskite phases are present for x > 2.5. It is found from XRD Rietveld analyses that the site occupancy of Fe3+ at the tetrahedral and octahedral sites in the garnet is independent of the amount of Y3+ substituted by Ce3+ and Gd3+ at the dodecahedral sites. The saturation magnetization for the sample with x = 0 and y = 3.0 is 4.35 emu/g, while that with x = 2.5 and y = 3.0 is 87.5 emu/g. When the Fe3+ composition y is varied from 0 to 3.0 at x = 2.5, the intensity of fluorescence at the emission wavelength,similar to 570 nm significantly decreases presumably due to absorption by Fe3+ that is increased in the crystal. (C) 2014 The Japan Society of Applied Physics

引用

页数：4

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