Weak ferromagnetism in Mn2+ doped Bi2Te3 nanocrystals grown in glass matrix

被引：8
|
作者：
Silva, R. S. [1 ]
Gualdi, A. J. [2 ]
Zabotto, F. L. [3 ]
Cano, N. F. [4 ]
Silva, A. C. A. [5 ]
Dantas, N. O. [5 ]
机构：
[1] Univ Fed Triangulo Mineiro, Dept Fis, ICENE, BR-38025180 Uberaba, MG, Brazil
[2] Univ Fed Sao Carlos, Dept Fis, GSM, BR-13565905 Sao Carlos, SP, Brazil
[3] Univ Fed Sao Carlos, Dept Fis, GMF, BR-13565905 Sao Carlos, SP, Brazil
[4] Univ Fed Sao Paulo, Dept Ciencias Mar, BR-11030400 Santos, SP, Brazil
[5] Univ Fed Uberlandia, LNMIS, Inst Fis, BR-38400902 Uberlandia, MG, Brazil
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 708卷
关键词：
Mn-doped; Bi2Te3; Ferromagnetism; Nanocrystals; Glass; IONS;
D O I：
10.1016/j.jallcom.2017.03.066
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：
We observed weak ferromagnetism in Bi2-xMnxTe3 nanocrystals grown in a glass matrix. Magnetization measurements at 5 K showed an increase in the coercive field that was proportional to Manganese concentration. Transmission Electron Microscopy images showed the formation of Bi2-xMnxTe3 nanocrystals with an average size of 5.0 nm. X-ray diffraction measurements revealed the hexagonal structure of the Bi2-xMnxTe3 nanocrystals and confirmed the replacement of Bi3+-ions with Mn2+-ions at different x(Mn)-concentrations. Electron Paramagnetic Resonance of these Mn-doped Bi2Te3 nanocrystals showed six lines associated with the S = 5/2 spin half-filled d-electrons that are characteristic of Mn2+ ions. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：619 / 622
页数：4
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