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- Delczeg-Czirjak, Erna K., et al.
(författare)
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Stabilization of the tetragonal distortion of Fe chi Co1-chi alloys by C impurities : A potential new permanent magnet
- 2014
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Ingår i: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 89:14, s. 144403-
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Tidskriftsartikel (refereegranskat)abstract
- We have analyzed by density functional theory calculations the structural and magnetic properties of Fe-Co alloys doped by carbon. In analogy with the formation of martensite in steels we predict that such a structure also forms for Fe-Co alloys in a wide range of concentrations. These alloys are predicted to have a stable tetragonal distortion, which in turn leads to an enhanced magnetocrystalline anisotropy energy of up to 0.75 MJ/m(3) and a saturated magnetization field of 1.9 T.
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| 2. |
- Eriksson, Susanna K, et al.
(författare)
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A versatile photoelectron spectrometer for pressures up to 30 mbar
- 2014
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Ingår i: Review of Scientific Instruments. - : American Institute of Physics (AIP). - 0034-6748 .- 1089-7623. ; 85:7, s. 075119-
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Tidskriftsartikel (refereegranskat)abstract
- High-pressure photoelectron spectroscopy is a rapidly developing technique with applications in a wide range of fields ranging from fundamental surface science and catalysis to energy materials, environmental science, and biology. At present the majority of the high-pressure photoelectron spectrometers are situated at synchrotron end stations, but recently a small number of laboratory-based setups have also emerged. In this paper we discuss the design and performance of a new laboratory based high pressure photoelectron spectrometer equipped with an Al Ka X-ray anode and a hemispherical electron energy analyzer combined with a differentially pumped electrostatic lens. The instrument is demonstrated to be capable of measuring core level spectra at pressures up to 30 mbar. Moreover, valence band spectra of a silver sample as well as a carbon-coated surface (graphene) recorded under a 2 mbar nitrogen atmosphere are presented, demonstrating the versatility of this laboratory-based spectrometer.
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| 5. |
- Wiegleb Edström, Desirée, 1959-, et al.
(författare)
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Phototherapy with ultraviolet radiation : a study of hormone parameters and psychological effects
- 2010
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Ingår i: Journal of the European Academy of Dermatology and Venereology. - : Blackwell Publishing. - 0926-9959 .- 1468-3083. ; 24:4, s. 403-409
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND AND OBJECTIVES: Patients report well-being as they are treated with phototherapy. We investigated hormone parameters and psychological well-being after phototherapy in a placebo-controlled study.METHODS: A total of 77 patients with dermatological conditions and 22 healthy volunteers were divided into four groups. The patients received phototherapy either on the whole body or only on hands and/or feet. The volunteers were given either whole-body phototherapy or placebo light. Serum or plasma samples were analysed for cortisol, calcium, magnesium, phosphate, TSH, T(4), T(3) and 25-hydroxyvitamin D, and urine samples for cortisol. Patients and volunteers answered a questionnaire before and 6 weeks after phototherapy/placebo light. Psychiatric ratings were performed according to the Comprehensive Psychopathological Self-rating Scale for Affective Syndromes, a self-report version of which has been transformed to correspond to the Montgomery-Asberg Depression Rating Scale (MADRS).RESULTS: In the patients who received whole-body irradiation, we observed a significant improvement in both MADRS score and cognitive-symptom score after the completion of phototherapy. We also observed a significantly higher level of 25-hydroxyvitamin D after phototherapy, but no difference in the other hormone parameters.CONCLUSION: Whole-body phototherapy of patients with dermatological conditions results in improved well-being and significantly higher levels of 25-hydroxyvitamin D in serum.
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