|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 大规模制备Ni_(80)Fe_(20)纳米线阵列及其磁学特性研究显示文摘利用电化学沉积方法在高度有序纳米孔氧化铝模板中大规模制备了Ni80 Fe2 0 纳米线阵列 .该方法得到的Ni80 Fe2 0 纳米线产率高 (约 10 1 2 — 10 1 3 cm2 ) ,而且这些纳米线阵列具有 (111)择优生长取向和很高的纵横比 .与体材料相比 ,这些Ni80 Fe2 0 纳米线阵列具有更高的矫顽力和较大的剩磁比等性能 ,在微型磁性元件领域将具有广泛应用前景 . | 符秀丽 王懿 李培刚 陈雷明 张海英 涂清云 L.H.Li 唐为华 | 2005 | 物理学报2005，54，4： | 11 |
| 2 | FIB快速加工纳米孔点阵的新方法显示文摘纳米尺度的点阵在纳米器件和基础科学研究方面都具有非常重要的应用 .目前普遍采用的聚焦离子束和电子束曝光技术可以很方便的在衬底上加工纳米量级的微细结构 ,但大面积的图形加工过程需要花费太多的机时 .介绍一种利用设计图形BMP文件的像素点阵和实际加工区域之间的匹配关系 ,通过聚焦离子束加工获得所需要的纳米孔点阵的新方法 .采用这种方法可以在短时间内获得大面积的纳米点阵结构 . | 陈雷明 李培刚 符秀丽 张海英 L.H.Li 唐为华 | 2005 | 物理学报2005，54，2： | 4 |
| 3 | La_(2/3)Ca_(1/3)MnO_3/Eu_2CuO_4/La_(2/3)Ca_(1/3)MnO_3磁性隧道结的制备与表征显示文摘采用磁控溅射 ,紫外线光刻和离子束刻蚀制备了La2 3Ca1 3MnO3 Eu2 CuO4 La2 3Ca1 3MnO3磁性隧道结 .通过对获得的磁性隧道结的I V特性测量 ,发现非线性的I V特性 ,显示结样品的隧穿特性 .有趣的是发现在电极材料La2 3Ca1 3MnO3的金属 绝缘体转变温度 (Tp)以下 ,I V曲线出现一个跳变 .随着温度降低 ,开始出现跳变的临界电流增大 ,但是跳变都发生在同样的电压下~ 2 0 9mV .当电流增大或减小在跳变点附近出现回滞 .这一跳变只发生在铁磁金属态 ,表明这是一个磁性相关联的效应 ,可能对应一种新的磁性开关过程 .虽然 ,目前对这一现象背后的物理机理还不清楚 ,但是 。 | 唐为华 李培刚 L.H.Li J.Gao | 2005 | 物理学报2005，54，1： | 2 |
| 4 | The Lobster Eye Imager for Astronomy Onboard the SATech-01 Satellite显示文摘The Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field X-ray Telescope of the Einstein Probe mission,was successfully launched onboard the SATech-01 satellite of the Chinese Academy of Sciences on2022 July 27.In this paper,we introduce the design and on-ground test results of the LEIA instrument.Using stateof-the-art Micro-Pore Optics(MPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the X-ray imager is realized.An optical assembly composed of 36 MPO chips is used to focus incident X-ray photons,and four large-format complementary metal-oxide semiconductor(CMOS)sensors,each of size 6 cm×6 cm,are used as the focal plane detectors.The instrument has an angular resolution of 4’-8’(in terms of FWHM)for the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of view.The detection passband is 0.5-4 keV in soft X-rays and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s observation.The total weight of LEIA is 56 kg and the power is 85 W.The satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 minutes.LEIA is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CMOS sensors for X-ray observation,and by optimizing the working setups of the instrumental parameters.In addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft X-ray band,albeit with limited useful observing time available. | Z.X.Ling X.J.Sun C.Zhang S.L.Sun G.Jin S.N.Zhang X.F.Zhang J.B.Chang F.S.Chen Y.F.Chen Z.W.Cheng W.Fu Y.X.Han H.Li J.F.Li Y.Li Z.D.Li P.R.Liu Y.H.Lv X.H.Ma Y.J.Tang C.B.Wang R.J.Xie Y.L.Xue A.L.Yan Q.Zhang C.Y.Bao H.B.Cai H.Q.Cheng C.Z.Cui Y.F.Dai D.W.Fan H.B.Hu J.W.Hu M.H.Huang Z.Q.Jia C.C.Jin D.Y.Li J.Q.Li H.Y.Liu M.J.Liu Y.Liu H.W.Pan Y.L.Qiu M.Sugizaki H.Sun W.X.Wang Y.L.Wang Q.Y.Wu X.P.Xu Y.F.Xu H.N.Yang X.Yang B.Zhang M.Zhang W.D.Zhang Z.Zhang D.H.Zhao X.Q.Cong B.W.Jiang L.H.Li X.B.Qiu J.N.Sun D.T.Su J.Wang C.Wu Z.Xu X.M.Yang S.K.Zhang Z.Zhang N.Zhang Y.F.Zhu H.Y.Ban X.Z.Bi Z.M.Cai W.Chen X.Chen Y.H.Chen Y.Cui X.L.Duan Z.G Feng Y.Gao J.W.He T.He J.J.Huang F.Li J.S.Li T.J.Li T.T.Li H.Q.Liu L.Liu R.Liu S.Liu N.Meng Q.Shi A.T.Sun Y.M.Wang Y.B.Wang H.C.Wu D.X Xu Y.Q Yang Y.Yang X.S.Yu K.X.Zhang Y.L.Zhang Y.H.Zhang Y.T.Zhang H.Zhou X.C.Zhu J.S.Cheng L.Qin L.Wang Q.L.Wang M.Bai R.L.Gao Z.Ji Y.R.Liu F.L.Ma Y.J.Shi J.Su Y.Y.Tan J.Z.Tong H.T.Xu C.B.Xue G.F.Xue W.Yuan | 2023 | Research in Astronomy and Astrophysics2023，23，9： | 2 |
| 5 | Field-resolved high-order sub-cycle nonlinearities in a terahertz semiconductor laser显示文摘The exploitation of ultrafast electron dynamics in quantum cascade lasers(QCLs)holds enormous potential for intense,compact mode-locked terahertz(THz)sources,squeezed THz light,frequency mixers,and comb-based metrology systems.Yet the important sub-cycle dynamics have been notoriously difficult to access in operational THz QCLs.Here,we employ high-field THz pulses to perform the first ultrafast two-dimensional spectroscopy of a free-running THz QCL.Strong incoherent and coherent nonlinearities up to eight-wave mixing are detected below and above the laser threshold.These data not only reveal extremely short gain recovery times of 2 ps at the laser threshold,they also reflect the nonlinear polarization dynamics of the QCL laser transition for the first time,where we quantify the corresponding dephasing times between 0.9 and 1.5 ps with increasing bias currents.A density-matrix approach reproducing the emergence of all nonlinearities and their ultrafast evolution,simultaneously,allows us to map the coherently induced trajectory of the Bloch vector.The observed high-order multi-wave mixing nonlinearities benefit from resonant enhancement in the absence of absorption losses and bear potential for a number of future applications,ranging from efficient intracavity frequency conversion,mode proliferation to passive mode locking. | J.Riepl J.Raab P.Abajyan H.Nong J.R.Freeman L.H.Li E.H.Linfield A.G.Davies A.Wacker T.Albes C.Jirauschek C.Lange S.S.Dhillon R.Huber | 2021 | Light(Science & Applications)2021，10，12： | 0 |
| 6 | ON FATIGUE CRACK PATH DEVIATION AT ELEVATED TEMPERATURE IN ELECTRON BEAM REPAIRED WELDMENTS OF TURBINE DISK显示文摘Fatigue crack growth behaviors in electron beam weldments of a nickel-base superalloy are studied. The objective of this paper is to discuss effects of the inhomogeneity of mechanical performance on fatigue crack growth (FCG) rate and crack path deviation (CPD). The base metal served in a turbine disk of aerospace engine was selected to fabricate bead-on-plate weldments by using electron beam welding. Some wedge-type opening loading specimens, notched in three different zone of weld metal, HAZ and base metal, were employed and performed fatigue crack growth tests at 650℃. The results show that the fatigue crack growth of electron beam welded joints is instable due to the influence of mechanical heterogeneities. Owing to the crack deviation at the weld metal and hcat-affected-zone (HAZ), the effective growth driving force at the tip of fatigue crack was reduced with the reduction of the effective stress intensity factor (SIF) which finally causes fatigue crack rate decrease. Fatigue crack was strongly affected by size and the symmetrical characteristics of the plastic zone at the crack tip, which means that the integrity of the welded structure containing the fatigue crack mainly depended on the toughness of the low strength zone. | H.Q.Zhang H.Y.Zhao Y.H.Zhang L.H.Li X.A.Zhang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员