| 1. |
- Huiberts, JN, et al.
(författare)
-
Synthesis of yttriumtrihydride films for ex-situ measurements
- 1996
-
Ingår i: JOURNAL OF ALLOYS AND COMPOUNDS. - : ELSEVIER SCIENCE SA LAUSANNE. - 0925-8388. ; 239:2, s. 158-171
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A new method has been developed to synthesize compact yttriumtrihydride by making use of a thin film technique. For electrical measurements yttrium films of typically 500 nm thickness are covered under UHV conditions by a 5 nm thick palladium overlayer wh
|
|
| 2. |
|
|
| 3. |
- Lanford, WA, et al.
(författare)
-
Compact broad range magnetic spectrometer for use in ion beam analysis
- 1998
-
Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - : ELSEVIER SCIENCE BV. - 0168-583X. ; 138, s. 1177-1182
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A compact magnetic spectrometer for high resolution He RBS and other types of ion beam analysis (IBA) has been designed and is currently under construction. This spectrometer is described, including its: energy resolution (similar to 1/2000), broad energy
|
|
| 4. |
- SEMPLE, M, et al.
(författare)
-
MOSSPAC - A UHV-SYSTEM FOR SURFACE AND THIN-FILM INVESTIGATIONS USING NUCLEAR PROBES
- 1995
-
Ingår i: VACUUM. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0042-207X. ; 46:8-10, s. 1049-1052
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- A UHV-system constructed for surface, thin film and superlattice measurements, using the time-differential perturbed gamma-gamma angular correlations (DPAC) and Mossbauer spectroscopy techniques, is described. Sample preparation is discussed, particularly
|
|
| 5. |
|
|
| 6. |
- Anisimov, AN, et al.
(författare)
-
The temperature-dependent in- and out-of-plane magnetic anisotropies in Fe-n/V-m(001) superlattices
- 1997
-
Ingår i: JOURNAL OF PHYSICS-CONDENSED MATTER. - : IOP PUBLISHING LTD. - 0953-8984. ; 9:48, s. 10581-10593
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Fe-n/V-m(001) superlattices grown on MgO(001) are studied by ferromagnetic resonance (FMR). The temperature dependence of the second- and fourth-order in- and out-of-plane magnetic anisotropies were determined from azimuthal and polar angular-dependent FM
|
|
| 7. |
- Azens, A, et al.
(författare)
-
Optical and electrochemical properties of dc magnetron sputtered Ti-Ce oxide films
- 1996
-
Ingår i: APPLIED PHYSICS LETTERS. - : AMER INST PHYSICS. - 0003-6951. ; 68:26, s. 3701-3703
-
Tidskriftsartikel (refereegranskat)abstract
- Reactive dc magnetron sputtering was used to make mixed Ti-Ce oxide films with a Ce/Ti ratio gamma between 0 and 0.6. Their optical and electrochemical properties were strongly dependent on the composition. Films with 0.3
|
|
| 8. |
- Azofeifa, D. E., et al.
(författare)
-
Temperature-and hydrogen-induced changes in the optical properties of Pd capped V thin films
- 2012
-
Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 86:6, s. 065702-
-
Tidskriftsartikel (refereegranskat)abstract
- Optical properties of V thin films deposited on MgO substrates have been obtained from spectrophotometric measurements. The V films were coated with a thin Pd layer to protect them from oxidation and to favor absorption of atomic hydrogen. Electrical resistance was recorded while hydrogen pressure was increased slowly up to 750mbar keeping the temperature constant. Simultaneously, visible and near-infrared transmittance spectra of this Pd/V/MgO system were measured. The spectra were numerically inverted to obtain the spectral behavior of the Pd and V dielectric functions at 22 and 140 degrees C. Hydrogen concentrations were first determined from the combined effect of hydrogen content on the electrical resistance and on the optical direct transmission of the system. Then, determination of these concentrations was improved using retrieved values of the absorption coefficients of the hydrides and taking into account the structural change of V and the volumetric expansion of Pd. Good agreement is established when considering qualitative correlations between spectral features of the optimized PdHy and VHx dielectric functions and band structure calculations and densities of states for these two transition metal hydrides.
|
|
| 9. |
- Cooper-Jensen, Carsten, et al.
(författare)
-
"m=1" coatings for neutron guides
- 2014
-
Ingår i: International Workshop on Neutron Optics and Detectors (NOP&D 2013) 2–5 July 2013, Munich, Germany. - : IOP Publishing. - 1742-6596 .- 1742-6588. ; 528, s. 012005-012005
-
Konferensbidrag (refereegranskat)abstract
- A substantial fraction of the price for a supermirror neutron guide system is the shielding, which is needed because of the gamma radiation produced as a result of neutron absorption in the supermirror layers. Traditional coatings have been made of nickel-titanium heterostructures, but Ni and Ti also have a fairly high absorption cross section for cold and thermal neutrons. We examine a number of alternatives to Ni as part of a study to reduce the gamma radiation from neutron guides. Materials such as diamond and Be have higher neutron scattering density than Ni, smaller absorption cross section, and when a neutron is absorbed they emit gamma photons with lower energies. We present reflectivity data comparing Ni with Be and preliminary results from diamond coatings showing there use as neutron guide coatings. Calculations show that Be and diamond coatings emit two orders of magnitude fewer gamma photons compared to Ni, mainly because of the lower absorption cross section.
|
|
| 10. |
- Duda, LC, et al.
(författare)
-
Hydrogen-induced changes of the electronic states in ultrathin single-crystal vanadium layers
- 1997
-
Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 55:19, s. 12914-12917
-
Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The electronic structure of vanadium in an Fe/V (001) superlattice, exposed to a 100 torr hydrogen pressure, was investigated using soft-x-ray emission spectroscopy and first-principles band-structure calculations. We present x-ray emission spectra from t
|
|
