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Journal of Materials Science & Technology 1998年第2期14卷 161-166页

作者： Bin WU Changyong CHEN and Shibin ZHANG(physics dept., Lanzhou University, Lanzhou 730000, China)Wanlu WANG and Kejun LIAO(Applied physics dept., Chongqing University, Chongqing 400044, China) physics dept. Lanzhou University Lanzhou 730000 China Applied physics dept. Chongqing University Chongqing 400044 China

Transparent conductive cadmium indium oxide films (CdIn2O4) were prepared by r.f. reactive sputtering from Cd-In alloy targets under an Ar-O2 atmosphere. Electrical conductivity of the order of 105Ω-1.m-1 and the optical transmission as high as 94% are easily attained by postdeposition annealing treatment. The effects of oxygen concentration in the reactive gas mixture and post-deposition annealing treatment on the optical transmittance as well as optical parameters, such as refractive index (n), extinction coefficient (k), real part (ε') and imaginary part (ε') of the dielectric constant, were studied in the visible and near-infrared region. The highfrequency dielectric constant ε∞ the plasma frequency ωP, and the conduction band effective mass mc of different samples were also investigated

关键词： Thin Effect of Oxygen Concentration and Annealing Theatment on the Optical Properties of the Transparent Conductive CdIn2O4 Thin Films

Magnetism and Its Dependence on Annealing Temperature for Sputtered Co/Cu Multilayers

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Journal of Materials Science & Technology 1998年第2期14卷 139-142页

作者： Gao, Ruwei Liu, Yihua Yan, Shishen Zhang, Deheng Zhang, Lin dept. of physics Shandong University Jinan 250100 China

It was found that the easy magnetization axes of the films are parallel to the substrate, and the magnetic properties of both as-sputtered and annealed multilayers are isotropic in the film plane. The coercive field H//c is 4.8 kA/m and the ratio of remanence-to-saturation magnetization M//r/M//s is about 0.73 for as-sputtered samples. Both H//c and M//r/M//s increase with increasing annealing temperatures, especially when annealing temperatures are higher than 400 degree C. These experimental results can be interpreted by using the ferromagnetic exchange coupling and the pinning theory of the coercivity. (Edited author abstract) 13 Refs.

关键词： Cobalt alloys

Fracture Toughness and Microcracks on Natural Apophyllite Crystals

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Journal of Materials Science & Technology 1998年第2期14卷 156-160页

作者： Dhar, P.R. Bamzai, K. Kotru, P.N. dept. of physics University of Jammu Jammu-180004 India

Results on fracture toughness of natural apophyllite crystals when they were subjected to impact were presented. The morphology of the cracks and fracture has been studied. It was found that the crack formation does not show any anisotropic property and remains the same whatever may be the orientation of the crystal. The average values of the fracture toughness K//c and brittleness index, as determined from measurements of crack length, were estimated to be 0.107 g mu m** minus **3**/**2 and 4.19 mu m** minus **1**/**2 respectively for the a(100) plane. The yield strength for a(100), P(111) and C(001) planes of apophyllite crystals for lower loads is 2250, 2160 and 1840 MPa and for higher loads is 1510, 1600 and 1430 MPa respectively. (Edited author abstract) 7 Refs.

关键词： Crystals

AC Conductivity of (As_2Te_3)_(100-x)Ge_x Bulk Glassy System

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Journal of Materials Science & Technology 1998年第3期14卷 247-250页

作者： A-Abdel-All(physics dept., Faculty of Science, Helwan University, Cairo, Egypt) physics dept. Faculty of Science Helwan University Cairo Egypt

The ac conductivity of the bulk amorphous chalcogenide system (As2Te3)100-xGex (where x=0,5,10,15 and 25 at. pct) was investigated at variable frequencies ranging from 50 Hz to 100 kHz and at different temperatures ranging from 3O to 160℃. lt was found that at a fixed temperature, where n <1 and decreases with temperature. The complex impedence Z was measured over the same frequency and temperature ranges. All samples give a semicircle arc originating at the origin point. This indicates that each composition can be described only by one resistance R and one capacity C, both parallelly combined. The centre below the real axis indicates the relaxation behaviour of the system. The activation energies for conduction were calculated.

关键词： Ge Te AC Conductivity of x)Ge_x Bulk Glassy System As2Te3

Composition Dependence and Irradation Effects on Residual Resistivity in Cu-Al Alloys

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Journal of Materials Science & Technology 1996年第4期12卷 261-266页

作者： M. Sadiq and Nazma Ikram(Centre for Solid State physics, University of the Punjab, New Campus, Lahore-54590, Pakistan)A. Shaukat(physics dept., University of the Punjab, New Campus, Lahore-54590, Pakistan)Farid A. Khwaja(dept. of physics, Quaid-e-Azam Uni Centre for Solid State physics University of the Punjab New Campus Lahore-54590 Pakistan physics dept. University of the Punjab New Campus Lahore-54590 Pakistan dept. of physics Quaid-e-Azam University Islamabad Pakistan

Residual electrical resistivity due to short-range order has been calculated for Cu100-xAlx (x=9.13,13.56, 14.5 and 14.76 in at pct) alloys using pseudopotential approach, and the results have been discussed in the light of experimental studies of the local-order structure of these alloys. In case of Cu85.5Al14.5, change in the total residual electrical resistivity due to neutron-irradiation effects has been estimated by including contributions from the short-range order and static atomic displacement correction. Our results show a decrease in the residual resistivity in the irradiated Cu-Al solid solution as compared to the unirradiated sample. This is in accordance with the experimental results

关键词： Al Composition Dependence and Irradation Effects on Residual Resistivity in Cu-Al Alloys Cu

Electron Spin Resonance of FeCl_3-filled Polyvinylidene Fluoride

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Journal of Materials Science & Technology 1997年第3期13卷 194-198页

作者： A.Tawansi H.I.Abdel-Kader and E.M.Abdel-Razek(dept. of physics, Faculty of Science, Mansoura University, 35516, Egypt)M I Ayad(dept. of Chemistry Almonofeya University, Shebeen E1-Koam, Egypt) dept. of physics Faculty of Science Mansoura University Egypt dept. of Chemistry Almonofeya University Shebeen El-Koam Egypt

Electron spin resonance (ESR) measurements were carried out at room temperature (=294 K),for FeCl3-filled polyvinylidene fluoride (PVDF) films, over the filling mass fraction range of 0 详细信息

Electron spin resonance (ESR) measurements were carried out at room temperature (=294 K),for FeCl3-filled polyvinylidene fluoride (PVDF) films, over the filling mass fraction range of 0

关键词： Figure Spin

Spectral-domain dyadic Green’s functions in chiral media

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Journal of Harbin Institute of Technology(New Series) 2009年第6期16卷 827-829页

作者：仲海洋秦治安姚丽陈宝玖 dept. of physics Dalian Maritime University

A novel method of deriving the electromagnetic dyadic Green＇s functions in an unbounded, lossless, reciprocal and homogeneous chiral media described by the constitutive relations D = εE ＋ jγB and H = jγE ＋ μ^-1B - （ωε）^-1γJ is given. The divergenceless and irrotational splitting of dyadic Dirac 8 function and Fourier transformation are used to directly obtain the divergenceless and irrotational component of spectral-domain dyadic Green＇s functions in chiral media. This method avoids using the dyadic Green＇s function eigenfunction expansion technique. The method given here can be generalized to a source-free region and an achiral case.

关键词： electromagnetic dyadic Green's function divergenceless component irrotational component dyadic Dirac δ function Fourier transformation

The redshift and the blueshift of spectral lines and the motion of mass-points in gravitational fields of photon stars

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Journal of Harbin Institute of Technology(New Series) 2007年第2期14卷 160-162页

作者：陈小凡杨学栋陈志来 dept. of physics Harbin Institute of Technology

The redshift and the blueshift of spectral lines in gravitational fields of photon stars are studied when the observing and emitting points of the spectral lines locate at different positions. And the motion of masspoints is also studied. The studies show that the redshift and the blueshift of spectral lines in gravitational fields of photon stars can he arbitrarily positive, and the motion of mass-points in gravitational fields of photon stars can be used to determine the mass of photon stars.

关键词： relativistic astrophysics quasars photon stars

Optimizing Domain Distribution of Grain Oriented Silicon Steel by Using Antimony as the Laser Surface Alloying Element

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Journal of Materials Science & Technology 2000年第2期16卷 163-164页

作者： Fengjiu SUN, Xingjie PENG and Chuanjun LI (dept. of physics, Northeastern University, Shengyang 110006, China) dept. of physics Northeastern University Shengyang 110006 China

For reducing the core loss of grain oriented silicon steel and improving its aging property, a new method, the LLSA by using Sb as the laser surface alloying element, was investigated, and at proper technique conditio... 详细信息

关键词： Optimizing Domain Distribution of Grain Oriented Silicon Steel by Using Antimony as the Laser Surface Alloying Element

State Properties of Strongly Coupled Electron-Phonon Systems with Correlated Displacement and Squeezing

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Journal of Materials Science & Technology 1999年第4期15卷 369-372页

作者： Xiaofeng PANG(dept. of physics, Xiangtan University, Xiangtan 411105, China)E-mail: pangxf@*** dept. of physics Xiangtan University Xiangtan 411105 China

The correlation effects among the polaronic and one-phonon coherent and two-phonon squeezed states induced by the motion and density fluctuation of the electrons change the state and properties of the strongly coupled electron-phonon systems and make the ground state energy decrease, the binding energy of the polarons increase, the CDW ordering enhance and the quantum fluctuation effect of the lattice phonons weaken.

关键词： Rev exp