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首页> 外文期刊>Applied Surface Science >Effect of adding aluminum ion on the structural,optical,electrical and magnetic properties of terbium doped yttrium iron garnet nanoparticles films prepared by sol-gel method
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Effect of adding aluminum ion on the structural,optical,electrical and magnetic properties of terbium doped yttrium iron garnet nanoparticles films prepared by sol-gel method

机译：添加铝离子对溶胶-凝胶法制备掺do钇铁石榴石纳米粒子薄膜结构，光学，电和磁性能的影响

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摘要

Tb_(0.8)Y_(2.2)Al_yFe_(5-y)O_(12) nanoparticle films with y = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 were prepared by a sol-gel method for potential use as a magnetic sensor and in magneto-optical applications. The films were deposited onto quartz substrate, followed by annealing at 900 ℃ in air for 2 h. X-ray diffractometry results confirmed the formation of a pure garnet structure. The lattice parameter decreased with increasing Al_(3+) content due to the substitution of Al_(3+) ions with the larger Fe_(3+) ions. The grain size of the films decreased up to y = 0.6. This variation is discussed based on the stress on the grain surface. The films observed to be transparent between 76 and 92% in the visible and infrared regions. The films demonstrated a strong absorption of 10~4 cm~_(-1) caused by the charge transfer transition in the UV region. The absorption edge shifts to lower wavelengths at higher Al contents of 0.8 and 1 due to electronic transitions. The conductivity of films increased with increasing of Al content due to the increasing in free carrier concentration. The saturation magnetization at room temperature decreased with increasing Al~(3+) content, whereas the coercivity increased markedly at y = 0.6.
机译：通过溶胶-凝胶法制备了y = 0.0、0.2、0.4、0.6、0.8和1.0的Tb_（0.8）Y_（2.2）Al_yFe_（5-y）O_（12）纳米颗粒膜，可作为磁传感器使用，并在磁光应用中。将膜沉积在石英基板上，然后在空气中900℃退火2小时。 X射线衍射结果证实了纯石榴石结构的形成。随着Al_（3+）离子被较大的Fe_（3+）离子取代，晶格参数随Al_（3+）含量的增加而降低。薄膜的晶粒尺寸减小到y = 0.6。基于晶粒表面的应力讨论了这种变化。观察到的膜在可见光和红外区域透明，介于76％和92％之间。薄膜显示出由于紫外线区域中的电荷转移跃迁而引起的10〜4 cm _（-1）的强吸收。由于电子跃迁，在较高的Al含量为0.8和1时，吸收边缘向较低的波长偏移。由于自由载流子浓度的增加，膜的电导率随着Al含量的增加而增加。室温下饱和磁化强度随Al〜（3+）含量的增加而降低，而矫顽力在y = 0.6时显着增加。

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  • 来源
    《Applied Surface Science》 |2014年第1期|150-157|共8页
  • 作者

    Ftema W. Aldbea; N.B. Ibrahim; M. Yahya;

  • 作者单位

    School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;

    School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;

    School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Films; Garnet; Sol-gel; Spin coating; Magnetization;

    机译：电影;石榴石;溶胶凝胶旋涂;磁化;

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