Peculiarities of crystal structure and superfine interactions in alloys Ti-Co-Sn

  • S.O. Yuryev Lviv Polytechnic National University
  • S.I. Yushchuk Lviv Polytechnic National University
  • V.V. Moklyak G. V. Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine
  • F.M. Gonchar Lviv Polytechnic National University
  • O.M. Gorina Lviv Polytechnic National University
  • B.B. Onyskiv Ivano-Frankivsk Scientific Research Forensic Center of the Ministry of Internal Affaris of Ukraine
Keywords: Heusler phases, Nuclear gamma resonance, magnetic field, isomeric shift

Abstract

Alloys with the general formula TiCo2-хSn  were produced by way of sintering primary components – pure metals in an argon atmosphere. The alloys were homogenized by annealing in the evacuated quartz vessel at T=1070 K during 500 h. X-ray diffraction analysis confirmed single-phase condition of all samples. Nuclear gamma resonance (NGR) analysis was made at T=295 and 80 K using radiation source BaSn119Sn. It was established, that Sn atoms in samples with x=0.6 and 1.0 are in two crystallographic positions, pyramids (1) and tetrahedrons (2) to which isomer shifts correspond (relative to SnO2  1.52-1.65 mm/s for Sn(1) and 2.99 mm/s for Sn(2). Zeeman splitting for Sn(1) in TiCo2Sn takes place at T=295 and 80 K, and for compositions with x=0.3-1.0 at T=80 K only. For Sn(2) it is noted only in alloy TiCoSn at T=80 K. The conclusion has been made on the reason of formation of effective magnetic fields on non-magnetic tin atoms nuclei.

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Published
2020-12-30
How to Cite
YuryevS., YushchukS., MoklyakV., GoncharF., GorinaO., & OnyskivB. (2020). Peculiarities of crystal structure and superfine interactions in alloys Ti-Co-Sn. Physics and Chemistry of Solid State, 21(4), 645-649. https://doi.org/10.15330/pcss.21.4.645-649
Section
Scientific articles