Journal of Materials Science

, Volume 49, Issue 4, pp 1666–1673 | Cite as

Landau–Zener spin transitions in Fe2+–Fe2+ quantum dots controlling dislocation mobility in NaCl:Fe crystals



Magnetic field induces transition in the distorted Fe2+–Fe2+ pairs (quantum dots) from the initial bonding singlet state to the high spin antibonding state providing decay of the pairs for two separated Fe2+ ions. Dislocations moving under internal stresses easily overcome separated Fe2+ ions in comparison with Fe2+–Fe2+ pairs lying close to the glide plane. Non-monotonous field dependence of dislocation displacements under internal stresses governed by short (100 μs) impulse of high magnetic fields up to 31 T was revealed in NaCl:Fe crystals. This non-typical dependence is the fingerprint of the Landau–Zener non-adiabatic spin transition between singlet and high spin states in quantum dots distorted by mechanical stresses of moving dislocations.


Edge Dislocation High Spin State Ionic Crystal Dislocation Core Contact Pair 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



Authors thanks Russian Fund for Basic Researches (Grant no 13-07-12027) for financial support.


  1. 1.
    Morgunov RB (2010) Light controlled magnetoresonant softening of γ-irradiated KCl:Fe crystals. J Appl Phys 108:064907–064911CrossRefADSGoogle Scholar
  2. 2.
    Morgunov RB, Buchachenko AL (2010) Magnetic field response of NaCl:Eu crystal plasticity due to spin-dependent Eu2+ aggregation. Phys Rev B 82:014115CrossRefADSGoogle Scholar
  3. 3.
    Ossypian YA, Morgunov RB, Baskakov AA, Shmurak SZ, Tanimoto Y (2004) New luminescent band induced by plastic deformation of NaCl:Eu phosphors. Phys Stat Sol 201:148–156CrossRefADSGoogle Scholar
  4. 4.
    Landau LD (1932) Zur Theorie der Energieubertragung II. Phys Sov Union 2:46–51Google Scholar
  5. 5.
    Zener C (1932) Non-adiabatic crossing of energy levels.sic. Proc R Soc Lond Ser A 137:696–702CrossRefADSGoogle Scholar
  6. 6.
    Garanin DA, Chudnovsky EM (2001) Spin tunneling via dislocations in Mn-12 acetate crystals. Phys Rev B 87:187203–187209Google Scholar
  7. 7.
    Molotskii MI (1975) Theoretical and experimental chemistry (translated from Teoreticheskaya I exsperimentalnaya Khimiya Rus,) 11: 142
  8. 8.
    Molotski M, Fleurov V (1997) Spin effects in plasticity. Phys Rev Lett 78:2779–2782CrossRefADSGoogle Scholar
  9. 9.
    Molotski M, Fleurov V (2000) Dislocation paths in a magnetic field. J Phys Chem B 104:3812–3816CrossRefGoogle Scholar
  10. 10.
    Kosevich A, Natsik V (1967) Slowing down of dislocations by scattering of elastic waves from impurities. J Exp Theor Phys Sov Phys JETP 24:810–817Google Scholar
  11. 11.
    Boesman E, Callens F, Haes J et al (1991) EPR of KCl: Fe. Solid State Commun 77:931–935CrossRefADSGoogle Scholar
  12. 12.
    Low W (1956) Paramagnetic resonance spectra of some ions of the 3d and 4f shells in cubic crystalline fields. Phys Rev 101:1827–1828MathSciNetCrossRefADSGoogle Scholar
  13. 13.
    Nistor SV, Mateescu DC (1985) A study on Fe+ centers in NaCl crystals. Solid State Commun 53:989–992Google Scholar
  14. 14.
    Low W (1960) Paramagnetic resonance in solids, solid state physics, vol 2. Academic press, New YorkGoogle Scholar
  15. 15.
    Buchachenko AL (2000) Recent advances in spin chemistry. Pure Appl Chem 72:2243–2258CrossRefGoogle Scholar

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© Springer Science+Business Media New York 2013

Authors and Affiliations

  1. 1.Institute of Problems of Chemical PhysicsMoscowRussia

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