Spin-wave excitations in superlattices self-assembled in multiferroic single crystals.
作者： V A Sanina , E I Golovenchits , V G Zalesskii
DOI: 10.1088/0953-8984/24/34/346002
关键词: Multiferroics 、 Ion 、 Materials science 、 Condensed matter physics 、 Superlattice 、 Spin wave 、 Charge carrier 、 Doping 、 Excited state 、 Spin (physics)
摘要: Spin-wave excitations revealed in the dynamically equilibrated one-dimensional superlattices formed due to phase separation and charge carrier self-organization doped single crystals of Eu0.8Ce0.2Mn2O5 Tb0.95Bi0.05MnO3 multiferroics are discussed. Similar excitations, but having lower intensities, were also observed undoped RMn2O5 (R=Eu, Er, Tb, Bi). This suggests that a transfer between manganese ions with different valences, which give rise superlattice formation, occurs as well. The spin native represent set homogeneous spin-wave resonances excited individual layers. positions these depend on relation numbers Mn3+ Mn4+ ions, concentrations, barrier depths It has been found frequency interval studied (30?50?GHz) form two minibands gap them.
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