Electrodeposition conditions-dependent crystal structure, morphology and electronic properties of Bi films

JOURNAL OF ALLOYS AND COMPOUNDS

卷:887

Article

Fedotov, Alexander^1,2  Shendyukov, Vladislav³  Tsybulskaya, Ludmila³  Perevoznikov, Sergey³  Dong, Mengge⁴  Xue, Xiangxin⁴  Feng, Xiating⁵  Sayyed, M. I.^6,7  Zubar, Tatiana⁸  Trukhanov, Alex^8,9,10  Tishkevich, Daria^8,9,11 

[1] Belarusian State Univ, Comp Modelling Dept, Phys Fac, Minsk 220030, BELARUS

[2] Univ Tyumen, Lab Biocompatible Nanoelect, Tyumen 625003, Russia

[3] Belarusian State Univ, Res Inst Phys Chem Problems, Lab Thin Films Chem, Minsk 220006, BELARUS

[4] Northwestern Univ, Dept Resource & Environm, Shenyang 110819, Liaoning, Peoples R China

[5] Northeastern Univ, Key Lab Minist Educ Safe Min Deep Met Mines, Shenyang 110819, Liaoning, Peoples R China

[6] Isra Univ, Fac Sci, Dept Phys, Amman, Jordan

[7] Imam Abdulrahman Bin Faisal Univ IAU, IRMC, Dept Nucl Med Res, Dammam 31441, Saudi Arabia

[8] Natl Acad Sci Belarus, SSPA Sci & Pract Mat Res Ctr, Lab Magnet Films Phys, Minsk 220072, BELARUS

[9] South Ural State Univ, Lab Single Crystal Growth, Chelyabinsk 454080, Russia

[10] LN Gumilyov Eurasian Natl Univ, Nur Sultan 010000, Kazakhstan

[11] Natl Univ Sci & Technol MISIS, Lab Phys Low Dimens Struct, Moscow 119049, Russia

关键词: Bismuth;    Electrodeposition;    Perchlorate electrolyte;    Microstructure;    Structure;    Electronic properties;   

DOI  :  10.1016/j.jallcom.2021.161451

来源: Elsevier

【 摘 要 】

The study is devoted to the electronic properties and structure of bismuth films obtained by electrodeposition from high-speed perchlorate electrolyte. Polycrystalline samples were synthesized in acidic perchlorate electrolyte under the (0.18-70.0) mA/cm(2) cathode current density and annealed at 265 degrees C in the He gas atmosphere. The structure, microstructure and electron properties of Bi films were characterized using X-Ray diffraction analysis, scanning electron microscopy, and electron backscattered diffraction. Electrical resistance, magnetoresistance, and Hall coefficient were studied at the 5-300 K temperature range under magnetic field up to 8 T. A specific and unexpected behavior has been found concerning the average size and shape of Bi grains with increasing of the current density: the increase in deposition current density up to 70.0 mA/cm(2) contributes to Bi films formation with more isotropic and reduced average grains size. Samples synthesized under 0.18 mA/cm(2) current density after annealing showed electronic properties, including magnetoresistance, similar to those of flawless single-crystals. The differences in the electronic characteristics of Bi films electrodeposited under different currents and electrolyte composition were explained by changes in electronic mobility due to scattering on grain boundaries. (C) 2021 Elsevier B.V. All rights reserved.

【 授权许可】

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