首页期刊信息编委及顾问期刊发行联系方式使用帮助常见问题ENGLISH
位置:首页 >> 正文
同质外延钛酸锶薄膜的生长模式图谱
作者:李金隆 龙兴贵 彭述明 罗顺中 傅依备 张鹰 李言荣  
单位:中国工程物理研究院核物理与化学研究所 中国工程物理研究院核物理与化学研究所 中国工程物理研究院核物理与化学研究所 中国工程物理研究院核物理与化学研究所 中国工程物理研究院核物理与化学研究所 电子科技大学微电子与固体电子学院 电子科技大学微电子与固体电子学院 四川绵阳621900 四川绵阳621900 四川绵阳621900 四川绵阳621900 四川绵阳621900 成都610054 成都610054 
关键词:同质外延  钛酸锶  生长模式  晶体 
分类号:O484.1
出版年,卷(期):页码:2007,35(1):16-20
DOI:
摘要:

利用激光分子束外延技术在SrTiO3(100)单晶基片上同质外延生长SrTiO3铁电薄膜。通过反射高能电子衍射原位实时监测薄膜生长,结合原子力显微镜等表征手段,分析了薄膜的表面微观结构,确定了薄膜的生长模式。根据反射高能电子衍射强度振荡曲线及衍射图样,通过改变薄膜的生长条件,实现了对薄膜生长模式的控制,绘制了SrTiO3薄膜的生长模式图谱:在高温、低沉积速率时,薄膜以二维层状模式生长为主;而在低温、高沉积速率下,薄膜则以三维岛状生长模式为主。从二维模式生长向三维模式生长的过渡区则表现为层状和岛状混合的Stranski–Krastanov生长模式。系统研究了生长条件对生长模式的影响,发现生长温度是影响薄膜生长过程中Ehrilich-Schwoebel扩散势垒的主要因素,而扩散势垒和沉积速率的变化决定了生长模式的改变。

how to catch a cheater redirect go
bystolic copay card click bystolic coupon voucher
cialis discount coupons coupons for cialis 2016 cialis 2015 coupon

Homoepitaxial SrTiO3 films on SrTiO3 (100) single crystal substrates were investigated under various conditions using laser molecular beam epitaxy. The growth mode was determined by in-situ reflective high energy electron diffraction, and the surface of the films was characterized by ex-situ atomic force microscopy. Combining the reflection high energy electron diffraction images and oscillations curves, the results show that the growth mode of the crystalline SrTiO3 films is transformed from two-dimensional layer-by-layer to the Stranski–Krastanov mode, and eventually to the three-dimensional island mode at low temperatures (300—550 ℃). The growth mode map of SrTiO3 films was obtained as a function of substrate temperature (under 600 ℃) for various laser repe- tition rates, which were used to determine the required parameters of the optimal growth conditions for a particular experiment. A kinetics growth process was proposed for better comprehension of the control mechanism of the growth mode under different growth conditions. The growth mode transition can be attributed to the surface mobility of atoms, which is principally dominated by the sub- strate’s temperature and deposition rate.

read go reasons wives cheat on their husbands
read why people cheat in relationships signs of infidelity
abortion pill abortion pill abortion pill
基金项目:
作者简介:
online women that cheat with married men married woman looking to cheat
online click open
redirect why do women cheat on their husbands unfaithful husband
redirect go why women cheat on men they love
cialis coupon cialis coupon cialis coupon
参考文献:

[1]BOUZEHOUANE K,WOODALL P,MARCIHAC B,et al.Enhanced dielectric properties of SrTiO3epitaxial thin film for tunable micro-wave devices[J].Appl Phys Lett,2002,80(1):109–111. [2]JIA Q X,FINDIKOGLU A T,REAGOR D,et al.Improvement in performance of electrically tunable devices based on nonlinear dielec-tric SrTiO3using a homoepitaxial LaAlO3interlayer[J].Appl Phys Lett,1998,73(8):897–899. [3]COPEL M,DUNCOMBE P R,Neumayer D A,et al.Metallization induced band bending of SrTiO3(100)and Ba0.7Sr0.3TiO3[J].Appl Phys Lett,1997,70:3227–3229. [4]HASHIMOTO K,XU H,MUKAIGAWA T,et al.Si monolithic mi-crobolometers of ferroelectric BST thin film combined with readout FET for uncooled infrared image sensor[J].Sens Actuators A,2001,88:10–19. [5]ZHAO T,CHEN F,LU H,et al.Thickness and oxygen pressure de-pendent structural characteristics of BaTiO3thin films grown by laser molecular beam epitaxy[J].J Appl Phys,2000,87:7442–7447. [6]KAWASAKI M,TAKAHASHI K,MAEDA T,et al.Atomic control of the SrTiO3crystal surface[J].Science,1994,266:1540–1542. [7]SHOJI M,SO B B,KEN Numata.Low temperature synthesis of high quality SrTiO3films[J].J Vac Soc Jpn,2002,45:90–96. [8]SHIMOYAMA K,KIYOHARA M,UEDONO A,et al.Homoepitaxial growth of SrTiO3in an ultrahigh vacuum with automatic supplying oxygen[J].Jpn J Appl Phys,2002,41:269–271. [9]LIPPMAA M,NAKAGAWA N,KAWASAKI M,et al.Growth mode mapping of SrTiO3epitaxy[J].Appl Phys Lett,2000,76:2439–2441. [10]TERASHIMA T,BANDO Y,IIJIMA K,et al.Reflection high-energy electron diffraction oscillations during epitaxial growth of high-tem-perature superconducting oxides[J].Phys Rev Lett,1990,65:2684–2687. [11]FREY T,CHI C C,TSUEI C C,et al.Effect of atomic oxygen on the initial growth mode in thin epitaxial cuprate films[J].Phys Rev B,1994,49:3483–3491. [12]MICHIO N,HIDEKI Y,HISASHI S.Reflection high-energy electron diffraction and atomic force microscopy studies on homoepitaxial growth of SrTiO3(001)[J].Physics C,1998,305:233–250. [13]EHRILICH G,HUDDA F G.Atomic view of surface self-diffusion:tungsten on tungsten[J].J Chem Phys,1966,44:1039–1043. [14]SCHWOEBEL R L,SHIPSEY E J.Step motion on crystal surfaces[J].J Appl Phys,1966,37:3682–3686. [15]GEORG R S,CHRISTIAN T,POELSEMA B,et al.Layer-by-layer growth of Ag on Ag(111)induced by enhanced nucleation:a model study for surfactant-mediated growth[J].Phys Rev Lett,1993,71:895–899.

my husband cheated on me redirect women who cheat on husband
服务与反馈:
文章下载】【加入收藏
中国硅酸盐学会《硅酸盐学报》编辑室
京ICP备10016537号-2
京公网安备 11010802024188号
地址:北京市海淀区三里河路11号    邮政编码:100831
电话:010-57811253  57811254    
E-mail:jccs@ceramsoc.com