Polarized positrons as spin detectors for paramagnetic centres in solids

U. Lauff, J. Major, A. Seeger, H. Stoll, A. Siegle, Ch Deckers, H. Greif, K. Maier, M. Tongbhoyai

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Abstract

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).

Original languageEnglish
Pages (from-to)165-168
Number of pages4
JournalPhysics Letters A
Volume182
Issue number1
DOIs
Publication statusPublished - Nov 8 1993

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Lauff, U., Major, J., Seeger, A., Stoll, H., Siegle, A., Deckers, C., Greif, H., Maier, K., & Tongbhoyai, M. (1993). Polarized positrons as spin detectors for paramagnetic centres in solids. Physics Letters A, 182(1), 165-168. https://doi.org/10.1016/0375-9601(93)90073-9