Electrical and magnetic properties of the composite pellets containing DBSA-doped polyaniline and Fe nanoparticles |
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| Affiliation: | 1. Department of Physics, School of Applied Science, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China;2. Material Research Center, Beijing Institute of Science and Technology, Beijing 100081, China;3. Beijing Nashengtong New Material & Technology Ltd. Co., 5-16 Yangfangdian East Street, Haidian District, Beijing 100038, China;1. Dept. of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, United States;2. Material Science and Engineering Program, The University of Texas at Austin, Austin, TX 78712, United States;2. Solid State Electronics Lab, Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katakira, Aoba-ku, Sendai 980-8577, Japan;1. Materials Science Laboratory, Institute of Nuclear Sciences, Vin?a, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;2. Department of Physical Chemistry, Institute of Nuclear Sciences, Vin?a, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;3. Laboratory of Theoretical and Condensed Matter Physics, Institute of Nuclear Sciences, Vin?a, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;1. University of Tabriz, Faculty of Physics, Tabriz, Iran;2. University of Tabriz, Faculty of Chemistry, Tabriz, Iran |
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| Abstract: | DBSA-doped polyaniline powder (DBSA-PANI) was mixed with Fe nanoparticles to obtain the DBSA-PANI-Fe composite. Powder of the composite was compacted to the pellets to study the electrical property and magnetization characteristic by measuring the conductivity in 100–300 K and the magnetization curve at room temperature. The conductivity of the composite pellet is linearly decreased from 0.25 ± 0.02 to 0.07 ± 0.01 S/cm with increasing the Fe nanoparticle content from 0 to 70 wt.%. For the pellets containing the Fe nanoparticles less than 70 wt.%, the variation of conductivity with temperature reveals that the charge transport mechanism can be considered to be one-dimensional variable-range-hopping (1D-VRH). For the pellet with 70 wt.%-Fe nanoparticles, however, the charge transport mechanism cannot be well understood in terms of the VRH model. All the DBSA-PANI-Fe composite pellets show a magnetic hysteresis loop and a hard magnetization characteristic. The saturation magnetization monotonously increases from 32 to 78 emu/g with increasing the Fe nanoparticle content from 30 to 70 wt.%. The saturation field and the coercivity are estimated to be about 5500 and 385 Oe, respectively, independent of the Fe nanoparticle content. |
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