| 1. |
- Malmhäll, Roger, et al.
(författare)
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Hall effect in Metglas 2826A and 2826 - dependence on temperature and pressure
- 1977
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Ingår i: Proceedings of International Conference on Magnetism, ICM 76. - : Elsevier. - 072040732X - 9780720407327 ; 86-88, s. 796-798
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Konferensbidrag (refereegranskat)abstract
- The Hall resistivity, ρH, of Metglas 2826A is measured for 0.6 ≤ T/Tc ≤ 1.9. Below To (∼255 K), the extraordinary Hall coefficient R1 is constant at +4.24 x x10-8 m3/As. The magnetic susceptibility, derived from our data, exhibits a Curie-Weiss behaviour above 350 K and varies as (T - Tc)-1.75 for (T - Tc) < 90 K. In 2826 at 300 K ρH drops linearly with increasing pressure.
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| 2. |
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| 3. |
- Alm, Ove, et al.
(författare)
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A multiple coaxial wire for pressure calibration
- 1974
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Ingår i: Review of Scientific Instruments. - : American Institute of Physics (AIP). - 0034-6748 .- 1089-7623. ; 45:4, s. 594-595
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Tidskriftsartikel (refereegranskat)abstract
- A single wire containing several metals suitable for pressure calibration has been produced by extrusion. Coaxial combinations of Ce-Bi-TI and Ce-Bi-Ba have been prepared by the procedure described.
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| 4. |
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| 5. |
- Alm, Ove, et al.
(författare)
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Thermal conductivity of KCl up to 19 kbar
- 1974
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Ingår i: Journal of Physics and Chemistry of Solids. - : Elsevier. - 0022-3697 .- 1879-2553. ; 35:3, s. 421-424
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Tidskriftsartikel (refereegranskat)abstract
- The pressure dependency of the thermal conductivity of KCl has been measured at room temperature up to 19 kbar. The high pressure tool was of the “belt” type and a solid medium was used. The specimen was cylindrical and was heated along its axis. The conductivity was found to increase linearly at a rate of (3·3 ± 0·3) per cent/kbar.
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| 6. |
- Alm, Ove, et al.
(författare)
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Thermal conductivity of NaCl up to 40 kbar and 240-400 K
- 1975
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 7:2, s. 235-239
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity, λ, of NaCl has been measured at pressures up to 40 kbar and temperatures between 240 K and 400 K in a solid medium in a 'belt' type of high-pressure apparatus. A steady state method with axial heating of a cylindrical specimen was employed. The increase of lambda with pressure was almost linear and the ratio of the thermal conductivity at 25 kbar to that at atmospheric pressure, λ(25)/λ(0), was found to be 1.72, and independent of temperature within the experimental error.
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| 7. |
- Alm, Ove, et al.
(författare)
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Thermal conductivity of NaF at high pressures
- 1979
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Ingår i: High Temperatures-High Pressures. - 0018-1544 .- 1472-3441. ; 11, s. 339-341
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Tidskriftsartikel (refereegranskat)abstract
- The thermal conductivity, λ, of NaF was measured over the pressure range 0-3 GPa at room temperature. An approximately linear variation of λ with P was observed in this range, and the ratio λ(P)/λ(0) was found to be 1.12 for P = 1 GPa.
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| 8. |
- Almbladh, Carl-Olof, et al.
(författare)
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Comments on core-hole lifetime effects in deep-level spectroscopies
- 1978
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Ingår i: Physical Review B. - 1550-235X. ; 17:2, s. 929-939
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Tidskriftsartikel (refereegranskat)abstract
- he effects of a finite core-hole lifetime on deep-level spectra in solids have recently attracted much interest. We here present a solvable model which enables a detailed analysis of lifetime effects. For x-ray photoemission and x-ray absorption, our analysis gives support for the usual convolution approach where the infinite lifetime spectrum is convoluted with a Lorentzian lifetime broadening. In particular, we demonstrate the inadequacy of a recent intuitive approach which predicts a suppression of the phonon broadening for short core-hole lifetimes. This is done by testing the different theories on our model. We also show that a straightforward diagrammatic analysis leads to the same conclusion. Finally, we discuss the phonon response to the total process of core-hole creation and subsequent annihilation in an x-ray or Auger emission event. It is explained in some detail that the lifetime independence of the shake-up connected with the first step in this process is in no contradiction with the fact that the phonon system is uneffected by the total deep-level process in the limit of short core-hole lifetimes. We also analyze the process of 1s hole creation and subsequent Auger K-LL emission and give explicit expressions for this process.
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| 9. |
- Almbladh, Carl-Olof
(författare)
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Incomplete phonon relaxation in X-ray emission
- 1976
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Ingår i: Solid State Communications. - 1879-2766. ; 22:6, s. 339-342
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Tidskriftsartikel (refereegranskat)abstract
- We calculate the phonon broadening in x-ray emission for Li, Na, Al, and K, treating the excitation and the subsequent emission as one quantum process. When the core-hole lifetime width is of the same order as the Debye energy, incomplete phonon relaxation gives a partial quenching of the Stokes shift and an additional width. This effect has previously not been seriously investigated; we find here that it gives a likely explanation of the broad Li emission edge.
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| 10. |
- Almbladh, Carl-Olof, et al.
(författare)
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Interpretation of high-energy X-ray satellites of L2,3 emission bands of Na, Mg, Al and Si
- 1975
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Ingår i: Journal of Physics C: Solid State Physics. - 0022-3719. ; 8:23, s. 4117-4123
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Tidskriftsartikel (refereegranskat)abstract
- The high-energy satellite of the L2,3 X-ray emission band in Na, Mg, Al and Si has for a long time been attributed to the decay of an initial state with two holes in the 2p shell. In particular, the satellite threshold has been assigned to an initial (2p2)1D state. It has recently been found that X-ray and Auger data give two different values for the energy of this doubly-ionized state, and attempts have been made to interpret this difference in terms of localized valence states. The authors have re-examined the interpretation of the L2,3, satellite using data on K and L2,3 satellites, Auger and radiative Auger KLL spectra. It is concluded that the L2,3 satellite originates from an initial (2p2)3P state, contrary to previous assumptions.
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