Phase Segregation of ZnO/ZnMgO Superlattice Affected by Ⅱ-Ⅵ Ratio

WANG Hao; ZHAN Hua-han; CHEN Xiao-hang; ZHOU Ying-hui; WANG Hui-qiong; KANG Jun-yong

doi:10.3788/fgxb20143505.0526

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Phase Segregation of ZnO/ZnMgO Superlattice Affected by Ⅱ-Ⅵ Ratio

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- Phase Segregation of ZnO/ZnMgO Superlattice Affected by Ⅱ-Ⅵ Ratio
- Chinese Journal of Luminescence Vol. 35, Issue 5, Pages: 526-530(2014)
- 作者机构：
  
  厦门大学物理系,福建厦门,361005
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143505.0526
  CLC： O484.4
- Received：07 January 2014，
  
  Revised：27 January 2014，
  
  Published Online：16 February 2014，
  
  Published：03 May 2014
- 稿件说明：
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王浩, 詹华瀚, 陈晓航等. Ⅱ-Ⅵ比对分子束外延生长的ZnO/ZnMgO超晶格的相结构调控[J]. 发光学报, 2014,35(5): 526-530

WANG Hao, ZHAN Hua-han, CHEN Xiao-hang etc. Phase Segregation of ZnO/ZnMgO Superlattice Affected by Ⅱ-Ⅵ Ratio[J]. Chinese Journal of Luminescence, 2014,35(5): 526-530
王浩, 詹华瀚, 陈晓航等. Ⅱ-Ⅵ比对分子束外延生长的ZnO/ZnMgO超晶格的相结构调控[J]. 发光学报, 2014,35(5): 526-530 DOI： 10.3788/fgxb20143505.0526.

WANG Hao, ZHAN Hua-han, CHEN Xiao-hang etc. Phase Segregation of ZnO/ZnMgO Superlattice Affected by Ⅱ-Ⅵ Ratio[J]. Chinese Journal of Luminescence, 2014,35(5): 526-530 DOI： 10.3788/fgxb20143505.0526.

摘要

在Zn

O中，

=0.4~0.6仍为一个岩盐矿和纤锌矿共存的结构，影响了其晶格质量。本文利用等离子体辅助的分子束外延设备在

面蓝宝石衬底上外延生长了ZnO/ZnMgO超晶格，并改变其生长过程中的Ⅱ-Ⅵ比，利用原子力显微镜、X射线衍射、透射谱和X射线光电子能谱对样品进行了表征分析。发现在较低氧分压下制备的样品结构以岩盐矿为主导，而在较高氧分压下两相共存并以纤锌矿为主。这种相分离现象与裂解氧原子的密度有关。

Abstract

ZnMgO alloy allows for tunable optoelectronic devices. However

the compositional range between ZnO and MgO is interrupted by a crystalline miscibility gap where the wurtzite crystal structure of ZnO is structurally incompatible with the rocksalt structure of MgO. In this article

ten periods of ZnO/ZnMgO superlattice were produced by plasma-assistant molecular beam epitaxy on

-plane sapphire substrate with different oxygen condition. It is found that the sample grown at lower oxygen flow and radio-frenquency (RF) plasma power tends to form rocksalt phase. With the increase of oxygen flow and RF plasma power

wurtzite phase tends to dominate and phase segregation is enhanced. The phase transform affected by the oxygen atoms density is reasoned by the formation enthalpies of ZnO and MgO.

关键词

Keywords

references

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