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| 1 | Integration of high-performance spin-orbit torque MRAM devices by 200-mm-wafer manufacturing platform显示文摘We demonstrate in-plane field-free-switching spin-orbit torque(SOT)magnetic tunnel junction(MTJ)devices that are capable of low switching current density,fast speed,high reliability,and,most importantly,manufactured uniformly by the 200-mm-wafer platform.The performance of the devices is systematically studied,including their magnetic properties,switch-ing behaviors,endurance and data retention.The successful integration of SOT devices within the 200-mm-wafer manufactur-ing platform provides a feasible way to industrialize SOT MRAMs.It is expected to obtain excellent performance of the devices by further optimizing the MTJ film stacks and the corresponding fabrication processes in the future. | Hongchao Zhang Xiangyue Ma Chuanpeng Jiang Jialiang Yin Shuqin Lyu Shiyang Lu Xiantao Shang Bowen Man Cong Zhang Dandan Li Shuhui Li Wenjing Chen Hongxi Liu Gefei Wang Kaihua Cao Zhaohao Wang Weisheng Zhao | 2022 | Journal of Semiconductors2022，43，10： | 2 |
| 2 | Groundwater vulnerability assessment and feasibility mapping under reclaimed water irrigation by a modified DRASTIC model 显示文摘 | Wu Wenyong Yin Shiyang Liu Honglu | 2014 | Water Resources Management2014，28，： | 1 |
| 3 | Stress Path Analysis of Deep-Sea Sediments Under the Compression-Shear Coupling Load of Crawler Collectors显示文摘The mechanical properties of deep-sea sediments during the driving process of crawler collectors are essential factors in the design of mining systems.In this study,a crawler load is divided into a normal compression load and a horizontal shear load.Then,the internal stress state of sedimentary soil is examined through a theoretical calculation and finite element numerical simulation.Finally,the driving of crawlers is simulated by changing the relative spatial position between the load and stress unit,obtaining the stress path of the soil unit.Based on the calculation results,the effect of the horizontal shear load on the soil stress response is analyzed at different depths,and the spatial variation law of the soil stress path is examined.The results demonstrate that the horizontal shear load has a significant effect on the rotation of the principal stress,and the reverse rotation of the principal stress axis becomes obvious with the increase in the burial depth.The stress path curve of the soil is different at various depths.The spatial variation rule of the stress path of the shallow soil is complex,whereas the stress path curve of the deep soil tends to shrink as the depth increases.The stress path of the corresponding depth should be selected according to the actual research purpose and applied to the laboratory test. | ZHANG Ning MA Ning YIN Shiyang CHEN Xuguang SONG Yuheng | 2023 | Journal of Ocean University of China2023，22，1： | 0 |
| 4 | Manipulating electromagnetic radiation of one-way edge states by magnetic plasmonic gradient metasurfaces显示文摘We theoretically and experimentally demonstrate that magnetic plasmonic gradient metasurfaces(GMSs) can convert a spatially propagating wave to a one-way edge state or vice versa with high efficiency. Consisting of an array of ferrite rods with a rotation gradient introduced to the rod dimers in the unit cell, GMSs can covert an incident wave beam to a one-way edge state with efficiency over 77%, and almost fully radiate into free space from the one-way edge state. The phenomenon arises from the unidirectional coupling of the spatial electromagnetic wave with magnetic plasmonic GMSs, which is evidenced from the photonic band diagrams of the edge state.The one-way edge state can radiate to or be excited from air with different angles by either engineering the gradient of the GMSs or tuning the bias magnetic field. By designing magnetic plasmonic GMSs with more exquisite configurations, we can expect many more nonreciprocal properties, adding additional freedom in manipulating electromagnetic waves. | Huabing Wu Xiang Xi Ximing Li Yin Poo Shiyang Liu Rui-Xin Wu | 2022 | Photonics Research2022，10，2： | 0 |
| 5 | Heterogeneous lamella design to tune the mechanical behaviour of a new cost-effective compositionally complicated alloy显示文摘A heterogeneous lamella(HL)design strategy was applied to manipulate mechanical properties of a new cost-effective Fe_(35)Ni_(35)Cr_(25)Mo_(5)compositionally complicated alloy(CCA).The HL structure was produced by single-step heat treatment(800℃for 1 h)after cold rolling.This HL structure consists of alternative lamellae regions of coarse-grained FCC matrix(5-20μm),and regions containing ultra-fine grains or subgrains(200-500 nm)together with nanoprecipitates(20-500 nm)and annealing twins.As compared with other cost-effective CCAs,the 800℃annealed sample with HL structure demonstrated a comparable tensile property,with yield strength over 1.0 GPa and total elongation of~13%.Formation of the annealing twins and nanoprecipitates decorated HL structure was a result of the concurrent partial recrystallization and precipitation ofσphase at the shear bands with a high density of lattice defects(e.g.high-density dislocation walls and deformation twins).The latter restricted the growth of recrystallized grains,leading to the formation of ultrafine subgrains within the HL structure.The high yield strength resulted from the multistage hetero-deformation induced(HDI)strengthening and precipitation strengthening associated with heterogeneous lamella structures containing nanoprecipitates.The ductility was originated from the coexistence of multiple deformation mechanisms,which started with dislocation slip and formation of stacking faults at the initial stage,followed by nano-twinning at the higher strain level.This HL design strategy,comprising composition and thermomechanical process designs,and the resultant microstructure tuning,open a broader window for the development of cost-effective CCAs with enhanced performance. | Yu Yin Qiyang Tan Qiang Sun Wangrui Ren Jingqi Zhang Shiyang Liu Yingang Liu Michael Bermingham Houwen Chen Ming-Xing Zhang | 2022 | Journal of Materials Science & Technology2022，，1： | 0 |
| 6 | The effects of incident light wavelength difference on the collective stimulated Brillouin scattering in plasmas显示文摘The first laser–plasma interaction experiment using lasers of eight beams grouped into one octad has been conducted on the Shenguang Octopus facility.Although each beam intensity is below its individual threshold for stimulated Brillouin backscattering(SBS),collective behaviors are excited to enhance the octad SBS.In particular,when two-color/cone lasers with wavelength separation 0.3 nm are used,the backward SBS reflectivities show novel behavior in which beams of longer wavelength achieve higher SBS gain.This property of SBS can be attributed to the rotation of the wave vectors of common ion acoustic waves due to the competition of detunings between geometrical angle and wavelength separation.This mechanism is confirmed using massively parallel supercomputer simulations with the three-dimensional laser–plasma interaction code LAP3D. | Qiang Wang Zhichao Li Zhanjun Liu Tao Gong Wenshuai Zhang Tao Xu Bin Li Ping Li Xin Li Chunyang Zheng Lihua Cao Xincheng Liu Kaiqiang Pan Hang Zhao Yonggang Liu Bo Deng Lifei Hou Yingjie Li Xiangming Liu Yulong Li Xiaoshi Peng Zanyang Guan Qiangqiang Wang Xingsen Che Sanwei Li Qiang Yin Wei Zhang Liqiong Xia Peng Wang Xiaohua Jiang Liang Guo Qi Li Minqing He Liang Hao Hongbo Cai Wudi Zheng Shiyang Zou Dong Yang Feng Wang Jiamin Yang Baohan Zhang Yongkun Ding Xiantu He | 2023 | Matter and Radiation at Extremes2023，8，5： | 0 |
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