Preparation and characterization of Ge-Ni-Te nanocomposite

Iman A. Mahdy; Salah M. El Sheikh; Hosny A. Omar; Pavel V. Seredin; Manal A. Mahdy

doi:10.17308/kcmf.2022.24/9264

Iman A. Mahdy Al-Azhar University, Physics Department, Faculty of Science (Girls), Nasr City 11753, Cairo, Egypt https://orcid.org/0000-0002-8550-5539
Salah M. El Sheikh School of Sciences and Engineering, Physics Department, American University in Cairo, New Cairo 11835, Cairo, Egypt
Hosny A. Omar School of Sciences and Engineering, Physics Department, American University in Cairo, New Cairo 11835, Cairo, Egypt
Pavel V. Seredin Voronezh State University, Physics Faculty, 1 Universitetskaya pl., Voronezh 394018, Russian Federation https://orcid.org/0000-0002-6724-0063
Manal A. Mahdy National Research Centre, Solid State Physics Department, Dokki 12622, Giza, Egypt https://orcid.org/0000-0002-8210-2312

DOI: https://doi.org/10.17308/kcmf.2022.24/9264

Keywords: Ni-Ge-Te, Nanocomposite, Structural and optical properties, Diamagnetic

Abstract

NixGe_50–xTe₅₀ with x = 2, 4, 6, 8, 10, 15 and 20 at% ternary nanocomposite prepared using multistage solid-state direct reaction. Nanocrystalline nature was studied by X-ray powder diffraction, results reviled that, the main phase is rhombohedral GeTe polymorph, and the second major phase is hexagonal Ni₃GeTe₂. The calculated average crystallite size of the whole constituents in prepared samples is within the range of 47.3-83.8 nm. Optical properties evaluated from diffuse reflection measurements and the calculated bandgap of all samples are nonmonotonically changes with Ni content from 1.45 to 1.62 eV with the direct allowed transition.

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Author Biographies

Iman A. Mahdy, Al-Azhar University, Physics Department, Faculty of Science (Girls), Nasr City 11753, Cairo, Egypt

Associate Professor, Physics
Department, Faculty of Science for Girls

Salah M. El Sheikh, School of Sciences and Engineering, Physics Department, American University in Cairo, New Cairo 11835, Cairo, Egypt

Professor, Physics Department

Hosny A. Omar, School of Sciences and Engineering, Physics Department, American University in Cairo, New Cairo 11835, Cairo, Egypt

Professor, Physics Department

Pavel V. Seredin, Voronezh State University, Physics Faculty, 1 Universitetskaya pl., Voronezh 394018, Russian Federation

Dr. Sci. (Phys.-Math.), Full
Professor, Chair of department, Department of Solid
State Physics and Nanostructures

Manal A. Mahdy, National Research Centre, Solid State Physics Department, Dokki 12622, Giza, Egypt

associate professor, Solid State
Physics Department

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