Polarized Positrons as Spin Detectors for Paramagnetic Centres in Solids
| Autor: | Hermann Stoll, M. Tongbhoyai, U. Lauff, Alfred Seeger, A. Siegle, Janos Major, Ch. Deckers, Karl Maier, H. Greif |
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| Rok vydání: | 1995 |
| Předmět: |
Physics
Annihilation Condensed matter physics Spin polarization Chemistry business.industry General Physics and Astronomy 02 engineering and technology Electron 021001 nanoscience & nanotechnology Polarization (waves) 01 natural sciences Magnetic field Paramagnetism Positron Semiconductor [PHYS.HIST]Physics [physics]/Physics archives 0103 physical sciences High Energy Physics::Experiment Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology business Doppler broadening |
| Zdroj: | Journal de Physique IV Proceedings Journal de Physique IV Proceedings, EDP Sciences, 1995, 05 (C1), pp.C1-81-C1-86. ⟨10.1051/jp4:1995109⟩ |
| ISSN: | 1155-4339 1764-7177 |
| DOI: | 10.1051/jp4:1995109 |
| Popis: | A novel technique for studying paramagnetic defects in insulators or semiconductors acting as positron traps is presented. The spin polarization of the paramagnetic electrons of such centres can be determined by investigating the annihilation of spin-polarized positrons, e.g., by Doppler-broadening or positron-lifetime measurements. The viability of this technique is demonstrated by measuring the temperature dependence of the polarization of the paramagnetic electrons in F-centres in KCl in high magnetic fields (±4.5T). |
| Databáze: | OpenAIRE |
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