Electron paramagnetic resonance spectra of PbMnI2 bulk crystals and nanocrystals

被引：7
|
作者：
Savchuk, A. I. [1 ]
Stolyarchuk, I. D. [1 ]
Stefaniuk, I. [2 ]
Rogalska, I. [2 ]
Sheregii, E. [2 ]
Makoviy, V. V. [1 ]
Shporta, O. A. [1 ]
机构：
[1] Chernivtsi Natl Univ, Dept Phys Semicond & Nanostruct, UA-58012 Chernovtsy, Ukraine
[2] Univ Rzeszow, Inst Phys, PL-35959 Rzeszow, Poland
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 345卷
关键词：
PbMnI2; Diluted magnetic semiconductor (DMS); Electron paramagnetic resonance; Crystal; Nanocrystal; PBI2; MN2+; EPR;
D O I：
10.1016/j.jmmm.2013.06.036
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report a study of the Pb1-xMnxI2 bulk crystals and nanocrystals using electron paramagnetic resonance (EPR). The samples of the bulk Pb1-xMnxI2 crystals with x in the range from 0 to 0.05 have been grown by Bridgman technique. The composite nanostructures containing the diluted magnetic semiconductor nanocrystals of Pb1-xMnxI2 with x in the range from 0 to 0.15 have been prepared by embedding them into gelatin and polyvinylalcohol matrices using colloidal technology. The EPR spectra consist of an intense broad line and several weak narrow lines which correspond to hyperfine spectra of Mn2+ ions. The temperature dependence of EPR spectra suggests of strong spin exchange interactions due to presence of magnetic ions in the bulk crystals and nanoparticles. The good agreement temperature dependence of integral intensity of Mn2+ ions for bulk crystals and nanocrystals with the Curie Weiss law was obtained. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：134 / 137
页数：4
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