6533b838fe1ef96bd12a459d
RESEARCH PRODUCT
Positron annihilation study of spin-crossover in [Fe x Zn1−x (ptz)6](BF4)2 single crystals
Attila VértesKároly SüveghRoland HinekPhilipp Gütlichsubject
Nuclear and High Energy PhysicsAnnihilationMaterials scienceCondensed matter physicsDetectorAnalytical chemistryAtmospheric temperature rangeCondensed Matter PhysicsAtomic and Molecular Physics and OpticsSpectral linePositronSpin crossoverLattice (order)Physical and Theoretical ChemistryDoppler broadeningdescription
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-crossover5T2 ↔1A1 and of the concomitant phase transformation.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-12-01 | Hyperfine Interactions |