Positron annihilation study of spin-crossover in [FexZn1-x(ptz)6](BF4)2 single crystals

Attila Vértes, Károly Süvegh, Roland Hinek, Philipp Gütlich

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Abstract

Positron lifetime measurements were carried out on [FexZn1-x(ptz)6](BF4)2 single crystals in the temperature range of 72-300 K. Complementary Doppler broadening spectra were also recorded at room temperature. The probability of the formation of o-Ps (lifetime 500-1400 ps) was between 10-30%. Both the spin density and the lattice parameters of the sample affected the lifetime of o-Ps through the ortho-para conversion and the pick-off annihilation, respectively. The positron annihilation technique proved to be a sensitive detector of the spin-crossover5T21A1 and of the concomitant phase transformation.

Original languageEnglish
Pages (from-to)483-489
Number of pages7
JournalHyperfine Interactions
Volume84
Issue number1
DOIs
Publication statusPublished - Dec 1 1994

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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