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Eu 2+ ‐Mn 2+ Energy Transfer in NaCl and KCl Crystals
Author(s) -
Cywiński R.,
Mügeński E.,
Sokólska I.
Publication year - 1990
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221570112
Subject(s) - ion , vacancy defect , acceptor , phonon , dopant , doping , chemistry , absorption (acoustics) , excitation , diffusion , exchange interaction , quadrupole , analytical chemistry (journal) , dipole , atomic physics , crystallography , materials science , condensed matter physics , ferromagnetism , physics , organic chemistry , chromatography , quantum mechanics , composite material , thermodynamics
It is shown that excitation energy transfer in doubly doped (Eu 2+ ‐donor, Mn 2+ ‐acceptor) KCl and NaCl crystals proceeds due to the presence of various aggregation products containing both dopant ions. In simple aggregates composed of Eu 2+ –cation‐vacancy and Mn 2+ –cation‐vacancy dipoles a single stage energy transfer Eu 2+ ‐Mn 2+ is proposed due to the multipole interaction (most probably of dipole–quadrupole type) or due to exchange interaction. In the case of Eu 2+ ‐rich precipitates with built‐in Mn 2+ ions, the energy transfer, after preceded energy diffusion in the donor system, is determined by the contribution of the phonons (phonon absorption in NaCl and phonon emission in KCl) and exchange interactions.