Optimal growth and thermal stability of crystalline Be 0.25Zn0.75O alloy films on Al2O 3(0001)

Dae Sung Park; A. Krupski; A. M. Sanchez; Chel Jong Choi; Min Su Yi; Hyun Hwi Lee; S. R.C. McMitchell; C. F. McConville

doi:10.1063/1.4870533

Optimal growth and thermal stability of crystalline Be _0.25Zn_0.75O alloy films on Al₂O ₃(0001)

Dae Sung Park
, A. Krupski
, A. M. Sanchez
, Chel Jong Choi
, Min Su Yi
, Hyun Hwi Lee
, S. R.C. McMitchell
, C. F. McConville

Department of Semiconductor Science and Technology

University of Warwick
Kyungpook National University
Pohang Accelerator Laboratory

Research output: Contribution to journal › Journal article › peer-review

12 Scopus citations

Abstract

The influence of growth temperature on the synthesis of Be _xZn_1-xO alloy films, grown on highly-mismatched Al₂O₃(0001) substrates, was studied by synchrotron x-ray scattering, high-resolution transmission electron microscopy and photoluminescence measurements. A single-phase Be_xZn _1-xO alloy with a Be concentration of x = 0.25, was obtained at the growth temperature, T_g = 400 °C, and verified by high-resolution transmission electron microscopy. It was found that high-temperature growth, Tg≥600 °C, caused phase separation, resulting in a random distribution of intermixed alloy phases. The inhomogeneity and structural fluctuations observed in the Be_xZn_1- _xO films grown at high temperatures are attributed to a variation in Be composition and mosaic distribution via atomic displacement and strain relaxation.

Original language	English
Article number	141902
Journal	Applied Physics Letters
Volume	104
Issue number	14
DOIs	https://doi.org/10.1063/1.4870533
State	Published - 2014.04.7

Quacquarelli Symonds(QS) Subject Topics

Physics & Astronomy

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@article{89c7329111c6454cb16c7ff30802a629,

title = "Optimal growth and thermal stability of crystalline Be 0.25Zn0.75O alloy films on Al2O 3(0001)",

abstract = "The influence of growth temperature on the synthesis of Be xZn1-xO alloy films, grown on highly-mismatched Al2O3(0001) substrates, was studied by synchrotron x-ray scattering, high-resolution transmission electron microscopy and photoluminescence measurements. A single-phase BexZn 1-xO alloy with a Be concentration of x = 0.25, was obtained at the growth temperature, Tg = 400 °C, and verified by high-resolution transmission electron microscopy. It was found that high-temperature growth, Tg≥600 °C, caused phase separation, resulting in a random distribution of intermixed alloy phases. The inhomogeneity and structural fluctuations observed in the BexZn1- xO films grown at high temperatures are attributed to a variation in Be composition and mosaic distribution via atomic displacement and strain relaxation.",

author = "Park, \{Dae Sung\} and A. Krupski and Sanchez, \{A. M.\} and Choi, \{Chel Jong\} and Yi, \{Min Su\} and Lee, \{Hyun Hwi\} and McMitchell, \{S. R.C.\} and McConville, \{C. F.\}",

year = "2014",

month = apr,

day = "7",

doi = "10.1063/1.4870533",

language = "English",

volume = "104",

journal = "Applied Physics Letters",

issn = "0003-6951",

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TY - JOUR

T1 - Optimal growth and thermal stability of crystalline Be 0.25Zn0.75O alloy films on Al2O 3(0001)

AU - Park, Dae Sung

AU - Krupski, A.

AU - Sanchez, A. M.

AU - Choi, Chel Jong

AU - Yi, Min Su

AU - Lee, Hyun Hwi

AU - McMitchell, S. R.C.

AU - McConville, C. F.

PY - 2014/4/7

Y1 - 2014/4/7

N2 - The influence of growth temperature on the synthesis of Be xZn1-xO alloy films, grown on highly-mismatched Al2O3(0001) substrates, was studied by synchrotron x-ray scattering, high-resolution transmission electron microscopy and photoluminescence measurements. A single-phase BexZn 1-xO alloy with a Be concentration of x = 0.25, was obtained at the growth temperature, Tg = 400 °C, and verified by high-resolution transmission electron microscopy. It was found that high-temperature growth, Tg≥600 °C, caused phase separation, resulting in a random distribution of intermixed alloy phases. The inhomogeneity and structural fluctuations observed in the BexZn1- xO films grown at high temperatures are attributed to a variation in Be composition and mosaic distribution via atomic displacement and strain relaxation.

AB - The influence of growth temperature on the synthesis of Be xZn1-xO alloy films, grown on highly-mismatched Al2O3(0001) substrates, was studied by synchrotron x-ray scattering, high-resolution transmission electron microscopy and photoluminescence measurements. A single-phase BexZn 1-xO alloy with a Be concentration of x = 0.25, was obtained at the growth temperature, Tg = 400 °C, and verified by high-resolution transmission electron microscopy. It was found that high-temperature growth, Tg≥600 °C, caused phase separation, resulting in a random distribution of intermixed alloy phases. The inhomogeneity and structural fluctuations observed in the BexZn1- xO films grown at high temperatures are attributed to a variation in Be composition and mosaic distribution via atomic displacement and strain relaxation.

UR - https://www.scopus.com/pages/publications/84898973407

U2 - 10.1063/1.4870533

DO - 10.1063/1.4870533

M3 - Journal article

AN - SCOPUS:84898973407

SN - 0003-6951

VL - 104

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 14

M1 - 141902

ER -

Optimal growth and thermal stability of crystalline Be _0.25Zn_0.75O alloy films on Al₂O ₃(0001)

Abstract

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