電化學反應(yīng)調(diào)控鈷酸鍶薄膜相變及其物理性質(zhì)變化
發(fā)布時間：2021-11-01 01:10
過渡金屬氧化物由于其獨特的電學、磁學特性和廣闊的應(yīng)用前景引起人們的廣泛關(guān)注并被研究了許多年。氧空位是氧化物中常見的一種缺陷,可以顯著地影響這些材料的結(jié)構(gòu)及性質(zhì),尤其是有序的氧空位。許多研究人員采用多種方法來調(diào)節(jié)氧化物中的氧空位以便調(diào)控其性質(zhì),如摻雜、退火處理、應(yīng)變調(diào)控、離子注入等。在本文中,我們提出了一種利用電化學反應(yīng)來調(diào)節(jié)SrCoO3-δ（SCO）中的氧含量及其相變的方法。本文的研究對象為SrCoO3-δ薄膜,SCO存在鈣鐵石相（BM-SCO）和鈣鈦礦相（P-SCO）兩種穩(wěn)定的相。其中鈣鐵石相的SCO為單斜結(jié)構(gòu),它的晶格常數(shù)為a=5.5739?、b=5.4697?、c=15.7450?,可以將它視為贗四方結(jié)構(gòu),這種結(jié)構(gòu)的晶格常數(shù)為at=3.905?和ct/2=3.936?。而鈣鈦礦相的SCO是立方結(jié)構(gòu),它的晶格常數(shù)為a=3.836?。根據(jù)文獻報道,鈣鐵石相SCO是一種反鐵磁的、絕緣的氧化物,而鈣鈦礦相SCO則是一種鐵磁的、金屬性的氧化物。選取SrTiO3（STO）作為襯底,S...
【文章來源】：哈爾濱工業(yè)大學黑龍江省 211工程院校 985工程院校
【文章頁數(shù)】：86 頁
【學位級別】：碩士
【文章目錄】：
摘要
Abstract
Chapter1 Introduction
1.1 Research background and significance of the research
1.2 The progress and achievements in the related fields
1.2.1 Substitution of A-site atoms in ABO_3
1.2.2 Post-treatment
1.2.3 Strain engineering
1.2.4 Ion injection
1.2.5 Other methods
1.3 The known properties of SrCoO3-δ
1.4 The main content of this thesis
Chapter2 Equipment and sample preparation
2.1 Equipment
2.1.1 Pulsed laser deposition
2.1.2 Atomic force microscopy
2.1.3 X-ray diffraction
2.1.4 Equipment for electric,magnetic and optical measurement
2.1.5 Electrochemical workstation
2.1.6 Method for in-situ observation
2.2 Sample preparation and characterization
2.2.1 Substrate selection and epitaxial relationship
2.2.2 Thin film growth
2.3 Conclusions
Chapter3 Control of phase transition by electrochemical reaction
3.1 Changes in SCO thin film under different voltages
3.1.1 Motivations
3.1.2 Transition from BM-SCO to P-SCO
3.1.3 Transition from P-SCO to BM-SCO
3.2 Phase transition by a constant voltage
3.2.1 Motivations
3.2.2 Transition from BM-SCO to P-SCO
3.2.3 Transition from P-SCO to BM-SCO
3.3 Discussion
3.3.1 Advantages
3.3.2 Disadvantages
3.4 Conclusions
Chapter4 Measurements of physical properties during phase transition
4.1 Electrical properties
4.1.1 Results and discussion
4.1.2 Possible application
4.2 Magnetic properties
4.3 Optical properties
4.3.1 Results and discussion
4.3.2 Possible application
4.4 Conclusions
Conclusions
References
Acknowledgements
本文編號：3469226
【文章來源】：哈爾濱工業(yè)大學黑龍江省 211工程院校 985工程院校
【文章頁數(shù)】：86 頁
【學位級別】：碩士
【文章目錄】：
摘要
Abstract
Chapter1 Introduction
1.1 Research background and significance of the research
1.2 The progress and achievements in the related fields
1.2.1 Substitution of A-site atoms in ABO_3
1.2.2 Post-treatment
1.2.3 Strain engineering
1.2.4 Ion injection
1.2.5 Other methods
1.3 The known properties of SrCoO3-δ
1.4 The main content of this thesis
Chapter2 Equipment and sample preparation
2.1 Equipment
2.1.1 Pulsed laser deposition
2.1.2 Atomic force microscopy
2.1.3 X-ray diffraction
2.1.4 Equipment for electric,magnetic and optical measurement
2.1.5 Electrochemical workstation
2.1.6 Method for in-situ observation
2.2 Sample preparation and characterization
2.2.1 Substrate selection and epitaxial relationship
2.2.2 Thin film growth
2.3 Conclusions
Chapter3 Control of phase transition by electrochemical reaction
3.1 Changes in SCO thin film under different voltages
3.1.1 Motivations
3.1.2 Transition from BM-SCO to P-SCO
3.1.3 Transition from P-SCO to BM-SCO
3.2 Phase transition by a constant voltage
3.2.1 Motivations
3.2.2 Transition from BM-SCO to P-SCO
3.2.3 Transition from P-SCO to BM-SCO
3.3 Discussion
3.3.1 Advantages
3.3.2 Disadvantages
3.4 Conclusions
Chapter4 Measurements of physical properties during phase transition
4.1 Electrical properties
4.1.1 Results and discussion
4.1.2 Possible application
4.2 Magnetic properties
4.3 Optical properties
4.3.1 Results and discussion
4.3.2 Possible application
4.4 Conclusions
Conclusions
References
Acknowledgements
本文編號：3469226
本文鏈接：http://sikaile.net/guanlilunwen/gongchengguanli/3469226.html
最近更新
教材專著
