2008 17th IEEE International Symposium on the Applications of Ferroelectrics最新文献_第4页

Atomic scale chemical and structural characterization of internal interfaces with atom probe tomography 原子探针层析成像的内部界面的原子尺度化学和结构表征

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693792

B. Gorman

{"title":"Atomic scale chemical and structural characterization of internal interfaces with atom probe tomography","authors":"B. Gorman","doi":"10.1109/ISAF.2008.4693792","DOIUrl":"https://doi.org/10.1109/ISAF.2008.4693792","url":null,"abstract":"Many nanoscale material systems require both structural and compositional characterization in order to be able to fully predict their electrical, magnetic, or optoelectronic behaviors. Traditional characterization techniques such as (S)TEM, SIMS, and XPS currently lack either spatial or chemical resolution needed for characterization of nanoscale devices. 3-dimensional atom probe has recently been utilized to determine the chemical and structural abruptness in a variety of materials with sub-nm spatial resolution and ~10ppm chemical resolution. In this talk, recent work utilizing a laser pulsed local electrode atom probe (LEAP) for the characterization of Photovoltaic devices will be illustrated. Specifically, dopant and H depth profiling in <10nm thick a-Si layers has been illustrated with ~1018/ cm3 chemical resolution. Additionally, interfacial abruptness in III¿V PV devices with a quantum well active region is illustrated with <1nm spatial resolution. Grain boundary analysis in metallic and semiconducting materials is also illustrated following site-specific FIB specimen preparation. Finally, transparent conducting oxide top contact layers have been analyzed for phase separation and following direct-write Maskless Mesoscale Materials Deposition (M3D) processing from polymeric precursors. Utilizing the laser pulsed LEAP for the analysis of TCOs also has illustrated the possibilities for analyzing lower conductivity, transparent materials such as dielectrics. The limitations and possible future applications to dielectric and ferroelectric applications will be discussed.","PeriodicalId":228914,"journal":{"name":"2008 17th IEEE International Symposium on the Applications of Ferroelectrics","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126318259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A methodology to characterize device-level endurance in 1T1C (1-transistor and 1-capacitor) FRAM 表征1T1C(1晶体管和1电容器)FRAM器件级耐用性的方法

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693962

W. Ahn, D. Jung, Y.K. Hong, H.H. Kim, Y. Kang, S.K. Kang, H.S. Kim, J. Kim, W. Jung, J. Jung, H. Ko, D. Choi, S.Y. Kim, E.S. Lee, J.Y. Kang, C. Wei, S.Y. Lee, K. A, H. Jung

引用次数: 1

Assembly and functionalization of 3D photonic crystals 三维光子晶体的组装与功能化

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693794

X. Yu, P. V. Braun

引用次数: 1

Structure-property relations in multifunctional bismuth ferrite - lead titanate 多功能铋铁氧体-钛酸铅的结构-性能关系

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693781

A. Bell, T. Comyn, Mikael A. Khan, T. Stevenson, T. Burnett

引用次数: 0

Piezoelectric microgenerator - current status, challenges, and applications 压电微型发电机——现状、挑战和应用

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693938

Hyun-uk Kim, S. Priya

引用次数: 7

Finite size effects in ferroelectric nanocrystals: Myths & facts 铁电纳米晶体的有限尺寸效应:神话与事实

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693767

E. K. Akdoğan, A. Safari

{"title":"Finite size effects in ferroelectric nanocrystals: Myths & facts","authors":"E. K. Akdoğan, A. Safari","doi":"10.1109/ISAF.2008.4693767","DOIUrl":"https://doi.org/10.1109/ISAF.2008.4693767","url":null,"abstract":"A phenomenological intrinsic finite size effect model for a single domain, mechanically free, and surface charge compensated ABO3 (PbTiO3 or BaTiO3) nanocrystals undergoing a first order tetragonal¿cubic phase transition is propsoed. By using experimental particle size-dependent spontaneous polarization data for PbTiO3 and BaTiO3, free energy expansion coefficients coefficients up to the sixth order as a function of ¿ is computed in the range <150 nm. It will be shown that the thermodynamic potential is able to predict the size-induced phase transition as well as the metastable tetragonal phase in the cubic phase field rigorously. The free energy surface is then contructed, which describes the decrease in tetragonal phase stability with decreasing ¿ rigorously. The intrinsic dielectric and piezoelectric properties of single domain, mechanically free, and surface charge compensated PbTiO3 nanocrystals are then evaluated. It will be shown that a decrease in dielectric susceptibility at the transition temperature with decreasing particle size is commensurate with predictions of lattice dynamics considerations. It will also be shown that an anomalous increase in piezocharge coefficients near ~15 nm is predicted. Finite size effects will then be discusssed in terms of depolarization fields, surface effects, role of defects, among others and salient aspects of myths & facts in the published literature will be analyzed.","PeriodicalId":228914,"journal":{"name":"2008 17th IEEE International Symposium on the Applications of Ferroelectrics","volume":"270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134175119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth of potassium lithium niobate-tantalate single crystal for piezoelectric applications 压电型铌酸锂-钽酸钾单晶的生长

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693823

M. Adachi, K. Takeuchi, T. Karaki

引用次数: 0

Ultrasound imaging arrays with improved transmit power capability 具有改进发射功率的超声成像阵列

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693873

M. Zipparo

{"title":"Ultrasound imaging arrays with improved transmit power capability","authors":"M. Zipparo","doi":"10.1109/ISAF.2008.4693873","DOIUrl":"https://doi.org/10.1109/ISAF.2008.4693873","url":null,"abstract":"Arrays optimized for conventional B-mode imaging applications are often limited in their ability to transmit power into the body, not by acoustic intensity limits but by face temperature maximums. Furthermore, new imaging modalities that use a long train of transmit pulses to remotely deposit a localized force on tissue are even more limited by array thermal considerations. Losses within the piezoceramic material are an important source of heat generation. Simply replacing the piezo material by one with lower losses will result in poorer imaging performance due to the physical properties and coarser microstructure of most low loss materials. This work describes the use of low loss piezoceramics exhibiting a microstructure that is ideal for forming into fine scale ultrasound arrays. Incorporating this material into multilayer ceramic and composite structures is shown to be an effective way to ameliorate the limitations of the base piezo and result in arrays with acoustic tank and imaging performance that is as good as or better than conventional imaging arrays made using a single layer of a conventional piezo. These arrays are also shown to exhibit reduced heating under equivalent electrical input power.","PeriodicalId":228914,"journal":{"name":"2008 17th IEEE International Symposium on the Applications of Ferroelectrics","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117273087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Mechanisms of aging in ferroelectrics: The orientation of dipoles versus the charge drift 铁电体老化机制:偶极子取向与电荷漂移

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693919

M. Morozov, D. Lupascu, Dragan Damjanovic

引用次数: 1

Structural, dielectric, electric, and ferroelectric properties of different routes derived of Ba1-xSrxTiO3 (BSTO) ceramic Ba1-xSrxTiO3 (BSTO)陶瓷的结构、介电、电学和铁电性能

2008 17th IEEE International Symposium on the Applications of Ferroelectrics Pub Date : 2008-12-02 DOI: 10.1109/ISAF.2008.4693900

R. M. Valdes, R. Palai, R. Katiyar

引用次数: 0