Hyperfine Interactions

, Volume 84, Issue 1, pp 483–489 | Cite as

Positron annihilation study of spin-crossover in [Fe x Zn1−x(ptz)6](BF4)2 single crystals

  • Attila Vértes
  • Károly Süvegh
  • Roland Hinek
  • Philipp Gütlich
Article

Abstract

Positron lifetime measurements were carried out on [Fe x Zn1−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.

Keywords

Thin Film Phase Transformation Sensitive Detector Spin Density Positron Annihilation 

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Copyright information

© J.C. Baltzer AG, Science Publishers 1994

Authors and Affiliations

  • Attila Vértes
    • 1
  • Károly Süvegh
    • 1
  • Roland Hinek
    • 2
  • Philipp Gütlich
    • 2
  1. 1.Department of Nuclear ChemistryLoránd Eötvös UniversityBudapestHungary
  2. 2.Institut für Anorganische Chemie und Analytische ChemieJohannes-Gutenberg-UniversitätMainzGermany

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