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Приказ резултата 451-460 од 461
Coulomb correlations and electronic structure of the spin-peierls cuprate CuGeO3
(Solid State Phenomena, 1998)
The generalization of the local(-spin)-density-approximation (L(S)DA) method for the systems with strong Coulomb correlations has been applied for the calcualtion of the electronic structure for the cuprate CuGeO3. The ...
Oscillation of the magnetic moment at metallic interfaces
(Solid State Phenomena, 1998)
Thin films and interfaces are particularly interesting because they offer the possibility of studyng a wide range of magnetic phenomena. Thus it is possible that normally nonmagnetic materials such as Pd or Rh may become ...
Magnetic moments of transition metals overlayers on fcc Ni surface
(Journal of Physics: Condensed Matter, 1998)
We calculate the magnetization profile in the (111) surface of face-centred cubic (fcc) Ni covered by a monolayer or a bilayer of 3d and 4d transition metals. The observed trends can be explained as in earlier works in ...
Comment on Oscillation of the Fe and Co magnetic moments near the sharp (1 -1 0) Fe/Co interface
(Physical Review Letters, 1998)
Microwave X-band permittivity measurements on 12-tungstophosphoric acid hexahydrate
(Solid State Ionics, 1997)
Complex permittivity measurements of 12-tungstophosphoric acid hexahydrate (WPA . 6H(2)O) have been performed in the X-band region at room temperature. Permittivity data were obtained by measuring reflection (S-11) and ...
Dielectric investigation of magnesium salt of 12-tungstophosphoric acid hydrate
(Solid State Ionics, 1999)
Magnesium salt of 12-tungstophosphoric acid (WPA) hydrate MgHPW12O40-14H(2)O has been investigated in the microwave (X-band) and in the lower frequency (5 Hz-500 kHz) region. The specimens were obtained by pressing powder. ...
Heteropolyacids as protonic conductors
(Materials Science Forum, 1996)
Protonic conductors belong to the conductors whose charge carriers are proton and protonic entities: H+, OH-, H2O, [H(H2O)(n)](+). A small group of these compounds have exceptionally high proton conductivity, Heteropolyacids ...
Detuned primary RF coupling system for variable frequency cyclotrons
(Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 1998)
A new concept of impedance matching for an RF amplifier coupled to a cyclotron cavity, named detuned primary coupling, is proposed. It does not require the motion of the coupling loop in vacuum and the matching for different ...
Application of a precise fiber-optical dee position measurement system in the cyclotron RF system design
(Nuclear Instruments and Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment, 1999)
A new fiber-optical dee position measurement system is developed for the VINCY cyclotron. The system includes a sensor head, a coherent optical fiber bundle and a light detector with control electronics. The sensor head ...
Effects of gamma irradiation on the stress relaxation of drawn ultrahigh molecular weight polyethylene
(Radiation Physics and Chemistry, 1999)
Effects of high energy radiation on stress relaxation behavior of unoriented (lambda = 1) and oriented (lambda = 9) ultrahigh molecular weight polyethylene (UHMWPE) were investigated. As in a previous study, the stress ...