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首页> 外文期刊>Journal of Applied Physics >Control of magnetic behavior by Pb_(1-x)Mn_xS nanocrystals in a glass matrix
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Control of magnetic behavior by Pb_(1-x)Mn_xS nanocrystals in a glass matrix

机译：通过玻璃基质中的Pb_（1-x）Mn_xS纳米晶体控制磁行为

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摘要

Diluted magnetic semiconductor nanocrystals, Pb_(1-x)Mn_xS (x = 0.003, 0.005, and 0.010), of approximately 6 nm were successfully grown in a glass matrix by a combination of fusion and thermal annealing. X-ray diffraction measurements reveal that the as-produced nanocrystals (NC), of group Ⅳ-Ⅵ, are single-phase, nanosized and crystallized in the rock salt structure with replacement of Pb~(2+)-ions by Mn~(2+)-ions. Magnetic force microscopy images also confirmed the high quality of the Pbl-xMnxS NC samples, showing a uniform distribution of total magnetic moments in the nanocrystals. The observation of characteristic hyperfine structures from electron paramagnetic resonance measurements provided evidence for Mn~(2+) incorporation within the PbS dot structure. Moreover, low temperature magnetization and susceptibility data showed that most of the magnetic ions hosted by the nanocomposite samples are in a paramagnetic state.
机译：通过融合和热退火的组合，成功地在玻璃基质中生长了约6 nm的稀磁性半导体纳米晶体Pb_（1-x）Mn_xS（x = 0.003、0.005和0.010）。 X射线衍射测量表明，所生成的Ⅳ-Ⅵ族纳米晶体（NC）是单相的，纳米级的且在岩盐结构中结晶，并被Mn〜（代替Pb〜（2 +）-离子）。 2+）离子。磁力显微镜图像还证实了Pbl-xMnxS NC样品的高质量，显示出纳米晶体中总磁矩的均匀分布。从电子顺磁共振测量中观察到的特征性超细结构为Mn〜（2+）掺入PbS点结构提供了证据。此外，低温磁化和磁化率数据表明，纳米复合材料样品中的大多数磁性离子处于顺磁性状态。

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  • 来源
    《Journal of Applied Physics》 |2012年第6期|p.064311.1-064311.5|共5页
  • 作者

    N. O. Dantas; F. Pelegrini; M. A. Novak; P. C. Morais; G. E. Marques; R. S. Silva;

  • 作者单位

    Universidade Federal de Uberlandia, Instituto de Fisica, Laboratorio de Novos Materials Isolantes e Semicondutores (LNMIS), 38400-902, Uberlandia MG, Brazil;

    Universidade Federal de Goias, Instituto de Fisica, 74001-970, Goidnia GO, Brazil;

    Universidade Federal do Rio de Janeiro, Instituto de Fisica 21945-970, Rio de Janeiro RJ, Brazil;

    Universidade de Brasilia, Instituto de Fisica, 70910-900, Brasilia DF, Brazil;

    Universidade Federal de Sao Carlos, Departamento de Fisica, 13560-905, Sao Carlos, SP, Brazil;

    Universidade Federal do Tridngulo Mineiro, Instituto de Ciencias Exatas e Naturals e Educacao (ICENE),Departamento de Fisica, 38025-180, Uberaba MG, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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