检索结果-南通市图书馆

thickness-dependent magnetic anisotropy in obliquely deposited Fe(001)/Pd thin film bilayers probed by VNA-FMR

Chinese Physics B 2019年第7期28卷 459-464页

作者： Wei He Yan Li Rui Sun Na Li Xu Yang Yang Li Zi-Zhao Gong Zong-Kai Xie Xiang-Qun Zhang Zhao-Hua Cheng State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100049 China Songshan Lake Materials Laboratory Dongguan 523808 China

The thickness-dependent magnetic anisotropy of obliquely deposited Fe(001)/Pd thin films on Mg(001) is investigated by fitting the field-dependent resonant field curve using the Kittel *** this study, three Fe film samples with thicknesses of 50 monolayers(ML), 45 ML, and 32 ML deposited at 0°, 45°, and 55°, respectively, are *** magnetic anisotropy constant obtained from ferromagnetic resonance(FMR) spectra exhibits a dominant fourfold magnetocrystalline anisotropy(MCA) at the normal deposition angle with larger Fe ***, the in-plane uniaxial magnetic anisotropy(UMA) is induced by a higher oblique deposition angle and a smaller *** hard axis lies between the [100] and [010] *** FMR data-fitting analysis yields a precise measurement of smaller contributions to the magnetic anisotropy, such as in-plane *** to MCA, when the magnetic field is weaker than the saturated field,the magnetization direction does not always align with the external *** squared frequency-dependent resonant field measurement gives an isotropic Landé g-factor of *** results are consistent with previous experiments conducted on the magneto-optical Kerr effect(MOKE) and anisotropic magnetoresistance(AMR) ***, a vector network analyzer ferromagnetic resonance(VNA-FMR) test-method for finding UMA in obliquely deposited Fe(001)/Pd bilayer ferromagnetic thin films, and determining the magnetic anisotropy constants with respect to the film normal deposition, is proposed.

关键词： oblique angle deposition iron film thickness magnetic anisotropy ferromagnetic resonance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness-dependent mechanical properties of nacre in Cristaria plicata shell:Critical role of interfaces

引用

Journal of Materials Science & Technology 2020年第9期44卷 1-8页

作者： S.M.Liang H.M.Ji X.W.Li Department of Materials Physics and Chemistry School of Materials Science and EngineeringKey Laboratory for Anisotropy and Texture of MaterialsMinistry of EducationNortheastern UniversityShenyang110819China

The thickness dependence of mechanical properties of nacre in Cristaria plicata shell was studied under three-point bending *** results show that the mechanical behavior of nacre exhibits a strong thickness *** bending strength firstly increases with the increase of specimen thickness and then becomes roughly constant as the thickness reaches a certain value of∼***,the mean value of work per unit volume increases constantly with increasing specimen thickness;meanwhile,the cracking mode changes from penetration into the platelets to deflection along the *** theoretical analyses indicate that the thickness-dependent mechanical properties of nacre are mainly caused by the variation in the number of inter-lamellar *** more the number of inter-lamellar interfaces is,the higher the strength and work of fracture of nacre under bending tests will ***,as the number of inter-lamellar interfaces reaches a certain value(e.g.,in the present specimen with 2.5mm thickness),the strength tends to remain constant,while the work of fracture still ***,the present research findings are expected to provide a valuable guidance for the interfacial design of nacre-like materials with high strength and toughness.

关键词： Cristaria plicata shell Nacre Mechanical property thickness Interface

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness-dependent highly sensitive photodetection behavior of lead-free all-inorganic CsSnBr_(3) nanoplates

引用

Rare Metals 2022年第5期41卷 1753-1760页

作者： Dong Liu Yan-Xue Yin Feng-Jing Liu Cheng-Cheng Miao Xin-Ming Zhuang Zhi-Yong Pang Ming-Sheng Xu Ming Chen Zai-Xing Yang School of Physics State Key Laboratory of Crystal MaterialsSchool of MicroelectronicsShandong UniversityJinan 250100China

Non-layered two-dimensional(2D) lead-free all-inorganic perovskites nanoplates have recently attracted considerable attention in photodetectors;however, the indepth investigation of thickness on photodetection performance is still lacking. In this work, by constructing the famous metal-semiconductor-metal photodetectors, the photodetection behaviors of thickness-controlled CsSnBr;nanoplates are investigated systematically. Ni electrodes are adopted for ensuring the good ohmic contact behaviors of as-fabricated photodetectors. With the increase in thickness, the photodetection performances improve accordingly, such as photocurrent increases from 0.22 to 19.40 nA, responsivity increases from 72.9 to 4893.7 mA·W^(-1), rise/decay time decreases from 11/35 to 3/10 ms, respectively. Notability, the dark current also increases with the increase in thickness, making the further investigation on the reduction in dark current *** of the as-fabricated photodetectors are stable, suggesting the careful thickness selection in next-generation high-performance lead-free all-inorganic perovskites photodetectors.

关键词： thickness Photodetection Lead-free all-inorganic perovskites Non-layered two-dimensional perovskites CsSnBr3 nanoplates

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness evolution of graphite-based cathodes in the dual ion batteries via in operando optical observation

引用

Journal of Energy Chemistry 2019年第2期28卷 122-128页

作者： Na Li Yaoda Xin Haosen Chen Shuqiang Jiao Hanqing Jiang Wei-Li Song Daining Fang Institute of Advanced Structure Technology Beijing Institute of Technology Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of Technology Overseas Education College Nanjing University of Technology Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School for Engineering of Matter Transport and EnergyArizona State University State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking University

Graphite has been currently considered as a promising cathode material in dual ion batteries(DIBs)due to its unique features of sp2 hybridized carbon and stacked two-dimensional layered ***,unexpected volume/thickness changes in the graphite cathodes,induced by the intercalation/deintercalation of anions with large molecular size have been known to be a critical problem in designing DIB *** understand the volume/thickness changes in the DIB electrodes,in operando optical observing apparatus has been employed to observe the cross-section view of a graphite-based cathode upon cycles in the present *** observation suggests that the cathode initially presented a huge irreversible thickness change(60%),and such thickness variation was prone to reduce and remain thickness variation at initial cycle should be attributed to both anion intercalation into graphite-based cathodes and irreversible decomposition of chemical components in the DIB *** method here highlights a universal route for fundamentally understanding the electrodes of huge volume variation.

关键词： Dual ion batteries In operando optical observation Graphite Cathode thickness evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness-dependent enhanced optoelectronic performance of surface charge transfer-doped ReS2 photodetectors

引用

Nano Research 2022年第4期15卷 3638-3646页

作者： Peiyu Zeng Wenhui Wang Jie Jiang Zheng Liu Dongshuang Han Shuojie Hu Jiaoyan He Peng Zheng Hui Zheng Liang Zheng Xiaojing Yao Weitao Su Dexuan Huo Zhangting Wu Zhenhua Ni Yang Zhang Lab for Nanoelectronics and NanoDevices Department of Electronics Science and TechnologyHangzhou Dianzi UniversityHangzhou 310018China School of Physics Southeast UniversityNanjing 211189China Jiangsu Province Special Equipment Safety Supervision and Inspection Institute Wuxi 214170China School of Sciences Hangzhou Dianzi UniversityHangzhou 310018China College of Physics and Hebei Advanced Thin Film Laboratory Hebei Normal UniversityShijiazhuang 050024China Institute of Materials Physics Hangzhou Dianzi UniversityHangzhou 310018China

Surface charge transfer doping has been widely utilized to tune the electronic and optical properties of semiconductor photodetectors based on low-dimensional *** many studies have been conducted on the performance(response time,responsivity,etc.)of doped photodetectors and their mechanisms,they merely examined a specific thickness and did not systematically explore the dependence of doping effects on the number of *** work performs a series of investigations on ReS_(2)photodetectors with different numbers of layers and demonstrates that the p-dopant tetrafluorotetracyanoquinodimethane(F_(4)-TCNQ)converts the deep trap states into recombination centers for few-layer ReS_(2)and induces a vertical p-n junction for thicker ReS_(2).A response time of 200 ms is observed in the decorated 2-layer ReS_(2)photodetector,more than two orders of magnitude faster than the response of the pristine photodetector,due to the disappearance of deep trap states.A current rectification ratio of 30 in the F_(4)-TCNQ-decorated sandwiched ReS_(2)device demonstrates the formation of a vertical p-n junction in a thicker ReS_(2)*** responsivity is as high as 2,000 A/W owing to the strong carrier separation of the p-n *** thicknesses of ReS_(2)enable switching of the prominent operating mechanism between transforming deep trap states into recombination centers and forming a vertical p-n *** thicknessdependent doping effect of a two-dimensional material serves as a new mechanism and provides a scheme toward improving the performance of other semiconductor devices,especially optical and electronic devices based on low-dimensional materials.

关键词： Surface charge transfer doping ReS_(2) thickness response time responsivity tetrafluorotetracyanoquinodimethane(F_(4)-TCNQ)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

thickness measurement approach for plasma sprayed coatings using ultrasonic testing technique

引用

中国有色金属学会会刊：英文版 2004年第Z1期14卷 88-91页

作者： LIN Li LI Xi-meng XU Zhi-hui LEI Ming-kai NDT&E Laboratory NDT&E Laboratory NDT&E Laboratory Surface Engineering Laboratory Dalian University of Technology Dalian 116024 China

The special ultrasonic testing system has been developed for thickness measurement of plasma sprayed coatings. The ultrasonic immersion method was used to obtain stable coupling condition and avoid other disadvantages of contact method. Spherical acoustic lens were designed to focus ultrasonic beam so as to improve beam directivity and concentrate ultrasonic energy. To increase testing precision and avoid mussy wave signals, moderate pulse width and frequency of the transducer has been selected. The displacement of transducer in X-Y-Z directions was precisely manipulated by step-controlled system to insure the accuracy of focus length and repetition of measurement. Optimized testing conditions (with the transducer of center frequency of 10 MHz and crystal diameter of 8 mm, focus length of 9.5 mm, diameter of focal column of 0. 1 mm and length of focal column of 0.27 mm) were selected to determine the thickness between 285 -414 μm of ZrO2 coatings plasma sprayed on the nickel based superalloy. The frequency interval of the periodic extremums in ultrasonic power spectra decreases with increasing coating thickness. The ultrasonic results accord with those of metallographical method.

关键词： plasma sprayed coatings thickness measurement ultrasonic testing interference

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

thickness and component distributions of yttrium-titanium alloy films in electron-beam physical vapor deposition

引用

Science China(Technological Sciences) 2008年第9期51卷 1470-1482页

作者： LI ShuaiHui SHU YongHua FAN Jing Laboratory of High Temperature Gas Dynamics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

thickness and component distributions of large-area thin films are an issue of in-ternational concern in the field of material processing. The present work employs experiments and direct simulation Monte Carlo (DSMC) method to investigate three-dimensional low-density, non-equilibrium jets of yttrium and titanium vapor atoms in an electron-beams physical vapor deposition (EBPVD) system furnished with two or three electron-beams, and obtains their deposition thickness and component distributions onto 4-inch and 6-inch mono-crystal silicon wafers. The DSMC results are found in excellent agreement with our measurements, such as evaporation rates of yttrium and titanium measured in-situ by quartz crystal reso-nators, deposited film thickness distribution measured by Rutherford backscat-tering spectrometer (RBS) and surface profilometer and deposited film molar ratio distribution measured by RBS and inductively coupled plasma atomic emission spectrometer (ICP-AES). This can be taken as an indication that a combination of DSMC method with elaborate measurements may be satisfactory for predicting and designing accurately the transport process of EBPVD at the atomic level.

关键词： electron beam physical vapor deposition thin film thickness and species distributions vapor atom non-equilibrium transport

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness distribution of large scale metallic sheet by EB-PVD on rotating substrate

引用

中国有色金属学会会刊：英文版 2005年第S3期15卷 232-235页

作者：单英春赫晓东李明伟李垚 Center for Composite Materials Harbin Institute of Technology Harbin 150001 China Center for Composite Materials Harbin Institute of Technology Harbin 150001 China Chengdu Aircraft Design and Research Institute Chengdu 610041 China

A two-dimensional kinetic Monte-Carlo(KMC) method was used to approach the thickness distribution of large scale metallic sheet deposited by electron beam physical vapor deposition(EB-PVD) on rotating substrate. The KMC model involves incident atom attachment, adatom diffusion and adatom detachment. The effective deposition rate and effective incident angle along substrate radial were studied as influencing factors of sheet thickness distribution. The KMC simulation results indicate that incident angle is a very important factor to affect the sheet thickness distribution as well as theory deposition mass. The experiments results show that the KMC model can predict the thickness distribution of large scale sheet deposited by EB-PVD on rotating substrate.

关键词： thickness distribution large scale metallic sheet kinetic Monte-Carlo method rotating substrate electric beam physical vapor deposition(EB-PVD)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness measurement of GaN epilayer using high resolution X-ray diffraction technique

引用

Science China(Physics,Mechanics & Astronomy) 2003年第4期46卷 437-440页

作者：冯淦朱建军沈晓明张宝顺赵德刚王玉田杨辉梁骏吾 State Key Laboratory on Integrated Optoelectronics Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China

In this paper we propose a new method for measuring the thickness of the GaN epilayer, by using the ratio of the integrated intensity of the GaN epilayer X-ray diffraction peaks to that of the sapphire substrate ones. This ratio shows a linear dependence on the GaN epilayer thickness up to 2 μm. The new method is more accurate and convenient than those of using the relationship between the integrated intensity of GaN epilayer diffraction peaks and the GaN thickness. Besides, it can eliminate the absorption effect of the GaN epilayer.

关键词： GaN, X-ray diffraction, thickness

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

thickness and Shape Synthetical Adjustment for DC Mill Based on Dynamic Nerve-Fuzzy Control

引用

Journal of Iron and Steel Research International 2004年第6期11卷 25-29页

作者： JIA Chun-yu WANG Ying-rui ZHOU Hui-feng Yanshan University

Due to the complexity of thickness and shape synthetical adjustment system and the difficulties to build a mathematical model,a thickness and shape synthetical adjustment scheme on DC mill based on dynamic nerve-fuzzy control was put forward,and a self-organizing fuzzy control model was *** structure of the network can be optimized *** the course of studying,the network can automatically adjust its structure based on the specific questions and make its structure the *** input and output of the network are fuzzy sets,and the trained network can complete the composite relation,the fuzzy *** decreasing the off-line training time of BP network,the fuzzy sets are *** simulation results indicate that the self-organizing fuzzy control based on dynamic neural network is better than traditional decoupling PID control.

关键词： dynamic BP network self-organizing fuzzy control encode DC mill thickness shape synthetical adjustment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：