Chemical Composition of High-T\(_{C} \text{ Ge}_{1 - x}\text{Mn}_{x}\) Nanocolumns Grown on \(\text{Ge}(001)\) Substrates

Le Thi Giang, Nguyen Manh An

Abstract


By mean of molecular beam epitaxy (MBE) equipped with a reflexion high-energy electron diffraction (RHEED) technique, we have chosen an intermediate and appropriate substrate temperature of 130\(\r{}\)C to reproducibly synthetize high-T\(_{C}\) Ge\(_{1 - x}\)Mn\(_{x}\) nanocolumns phase. Laser Pulse Atom Probe Tomography (LP-APT) technique have been used to determine at atomic scale the chemical composition inside nanocolumns and also in the surrounding diluted matrix. The Mn concentration inside nanocolumns is found to be highly inhomogeneous, it is about 20\({\%}\) at the bottom and can increase up to \(\sim 40{\%}\) in the top near the surface region. The Mn concentration in the matrix is about 0.25\({\%}\) at the surface and can reach a highest value of $\sim $1{\%} in regions close to the interface.


Keywords


GeMn diluted magnetic semiconductors, chemical composition, high-T$_{C}$ nanocolumns, thin film

Full Text:

PDF


DOI: https://doi.org/10.15625/0868-3166/24/2/4009 Display counter: Abstract : 67 views. PDF : 33 views.

Refbacks

  • There are currently no refbacks.




Editorial Office:

Communications in Physics

1st Floor, A16 Building, 18B Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam

Tel: (+84) 024 3791 7102 

Email: cip@vjs.ac.vn

Copyright by