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首页> 外文期刊>Materials Science and Engineering >Correlation between chemical composition, electrical, magnetic and microwave properties in Dy-substituted Ni-Cu-Zn ferrites
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Correlation between chemical composition, electrical, magnetic and microwave properties in Dy-substituted Ni-Cu-Zn ferrites

机译：黄铁氧物中化学成分，电，磁性和微波性能的相关性

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摘要

Dy~(3+) ion-substituted nanoferrites Ni_(0.4)Cu_(0.2)Zn_(0.4)Fe_(2-x)Dy_xO_4 (x ≤ 0.04) were produced via sol-gel method.Correlation between chemical composition, crystal structure, electrical, magnetic and microwave properties was investigated. All samples were characterized by single-phase state. It was observed that the increase of the Dy content leads to a decrease in the average crystallite size. The bandgap (E_g) was deduced to be between 1.83 and 1.86 eV. The measurements of magnetization versus applied magnetic field (M-H) and magnetization versus temperature (M-T) were investigated by vibrating sample magnetometer (VSM). Magnetic measurements revealed superparamagnetic character at room temperature. The magnetization was increased initially with doping Dy~(3+) in the ratio of x = 0.01 compering to the un-doped sample and thereafter dropped as Dy~(3+) ions content further increases. Microwave properties were discussed in terms of electromagnetic absorption in the frequency range 1-20 GHz. The occurrences of the intensive electromagnetic absorption in the frequency ranged from 1.6 to 2.7 GHz were observed. The changes in the amplitude-frequency characteristics correlated well with the level of chemical substitution (ⅹ) with Dy ions concentration.
机译：通过溶胶 - 凝胶法生产Dy〜（0.4）离子取代的纳米铁Ni_（0.4）Cu_（0.2）Zn_（0.2）Zn_（0.4）Fe_（2-x）Dy_xO_4（X≤0.04）。化学成分，晶体结构之间的胶形胶形，研究了电，磁性和微波性质。所有样品的特征在于单相状态。观察到Dy含量的增加导致平均微晶尺寸的降低。带隙（E_G）被推导为1.83和1.86eV之间。通过振动样品磁力计（VSM）研究了磁化与施加磁场（M-H）和磁化与温度（M-T）的测量值。磁性测量显示室温下的超顺磁性。最初用掺杂Dy〜（3+）掺杂掺杂的掺杂〜0.01掺杂到未掺杂的样品的比例增加，然后作为Dy〜（3+）离子含量进一步增加。在频率范围1-20GHz的电磁吸收方面讨论了微波性能。观察到频率的强烈电磁吸收的发生从1.6到2.7GHz。幅度频率特性的变化与Dy离子浓度的化学取代水平相比好。

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  • 来源
    《Materials Science and Engineering》 |2021年第8期|115202.1-115202.12|共12页
  • 作者

    M.A. Almessiere; Y. Slimani; H. Guenguenes; A. Demir Korkmaz; S.V. Trukhanov; S. Guner; F. Alahmari; A.V. Trukhanov; A. Baykal;

  • 作者单位

    Department of Biophysics Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 31441 Dammam Saudi Arabia;

    Department of Biophysics Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 31441 Dammam Saudi Arabia;

    Department of Physics Hint University 19030 Cevre Yolu Bulvan-Corum Turkey;

    Department of Chemistry Istanbul Medeniyet University 34700 Uskudar-Istanbul Turkey;

    SSPA 'Scientific and Practical Materials Research Centre of NAS of Belarus' 220072 Minsk 19 P. Brovki Str Belarus;

    Institute of Inorganic Chemistry RWTH Aachen University D-52074 Aachen Germany;

    Department of Nanomedicine Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 31441 Dammam Saudi Arabia;

    SSPA 'Scientific and Practical Materials Research Centre of NAS of Belarus' 220072 Minsk 19 P. Brovki Str Belarus South Ural State University 454080 Chelyabinsk 76 Lenina Ave Russia;

    Department of Nanomedicine Institute for Research and Medical Consultations (IRMC) Imam Abdulrahman Bin Faisal University P.O. Box 1982 31441 Dammam Saudi Arabia;

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  • 正文语种 eng
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  • 关键词

    Spinel ferrites; Nanoparticles; Magnetic properties; Microwave properties; Domain boundaries resonance;

    机译：尖晶石铁氧体;纳米粒子;磁性;微波特性;域边界共鸣;

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