摘要:

AbstractFor vitreous antimony trisulfide films (thickness 6.4 to 16.1 μm) the steady‐state current‐voltage characteristics were measured. The current proportional toU2d−3are interpreted in terms of space‐charge‐limited currents (SCLC) with a single trap level. It is proved that a steep current increase at the end of the square‐law region is caused by trap filling. The values of the parameters of this trapping level calculated using two independent methods – from the temperature dependence of the reduction factor θ and from the trap‐filled limit (TFL) voltage – are in close agreement. The polarization the conduction mechanism of vitreous Sb2S3films at lower tempera

ISSN:0370-1972    

DOI:10.1002/pssb.19690310144

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe resistivity change of thin films of nickel and iron is investigated in planar magnetic fields above 4 kOe. After being saturated, the films exhibit negative slopes of different magnitude in the transverse and longitudinal resistivities. The observations at room temperature indicate essential thickness dependences of the Δϱ‐effect as well as of the slopes. A correlation method is used to prove it. In an attempt to give an explanation of the negative magnetoresistance anisotropy the d‐electrons have to be viewed as localized and itinerant at the same

ISSN:0370-1972    

DOI:10.1002/pssb.19690310145

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe spectral dependence of the refractive indices and birefringence of CdSxSe1−x(including CdS and CdSe) single crystals has been investigated from the fundamental absorption edge up to the lattice vibration spectrum in the temperature interval 100 to 600 °K. In the region ofv>5000 cm−1the measurements are carried out by the method of prism (with an absolute error fornof 5 × 10−4), forv<5000 cm−1by the modified interference method (with an absolute error fornof 5 × 10−3, and for Δn=ne−noof (2 to 4) × 10−5). The res

ISSN:0370-1972    

DOI:10.1002/pssb.19690310146

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThe results of the theoretical study of the electronic states of the M′‐centre in alkali halides are reported. No empirical parameters are used in this calculation. – The electronic core polarization is taken into account (within the limits of model of the polarizable point ion lattice), and is found to be essential for the charged M′‐centre. The results of the calculation are in good agreement with the experimental data for KCl and KBr crystals and can be considered as a thoretical confirmation of the F 2′‐model o

ISSN:0370-1972    

DOI:10.1002/pssb.19690310147

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractThis paper deals with the anisotropy induced by thermomagnetic treatment in mono crystals of Ni0.620Co0.100Fe 0.2602+Fe 2.0163+□0.004O 42−. The induced magnetic anisotropy has been studied and an explanation of this effect is proposed. For (100) and (110) planes the experimental data agree with the cal

ISSN:0370-1972    

DOI:10.1002/pssb.19690310148

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractLiterature is not available on the grain growth in polycrystalline ice. The present paper deals with such grain growth in pure ice and ice doped with sodium chloride. The technique consists in measuring grain size distributions as a function of time and deriving the numberaverage equivalent “diameter”, considering the grains as spheres. The functional relationship between the average diameter and time of growth is, for pure and doped ice, of the same form as that found for metals. Arrhenius plots show that the energy of activation is higher for doped ice than for pure ice. The results are discussed in terms of interfacial free energy as being ultimately responsible for grain growth. On a molecular scale, processes take place, which lead to diffusion of units consisting of a number of water molecules across the boundar

ISSN:0370-1972    

DOI:10.1002/pssb.19690310149

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

摘要:

AbstractFrom electron transit time measurements the electron drift mobility in KCl has been deduced for the temperature range 200 to 500 °K. By comparison with low temperature Hall mobility data it is concluded that above 300 °K the measured values coincide with the microscopic mobility μ of conduction band electrons which may be described by μ = μ0[exp (θ/T) − 1]. Below 300 °K the measured drift mobility is controlled by the interaction of the conduction band electrons with shallow traps. These traps also influence the electron lifetime. Since the electron mobilities in AgCl and TlCl deduced from the literature may also be represented by the expression given above that this expression is generally valid for ionic crystals with intermediate electron‐phono

ISSN:0370-1972    

DOI:10.1002/pssb.19690310150

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY

ISSN:0370-1972    

DOI:10.1002/pssb.19690310101

出版商:WILEY‐VCH Verlag    

年代:1969

数据来源: WILEY