Abstract：
:A novel type of sub-lattice of the Jahn-Teller (JT) centers was arranged in Ti-doped barium hexaferrite BaFe12O19. In the un-doped crystal all iron ions, sitting in five different crystallographic positions, are Fe3+ in the high-spin configuration (S = 5/2) and have a non-degenerate ground state. We show that the electron-donor Ti substitution converts the ions to Fe2+ predominantly in tetrahedral coordination, resulting in doubly-degenerate states subject to the [Formula: see text] problem of the JT effect. The arranged JT complexes, Fe2+O4, their adiabatic potential energy, non-linear and quantum dynamics, have been studied by means of ultrasound and terahertz-infrared spectroscopies. The JT complexes are sensitive to external stress and applied magnetic field. For that reason, the properties of the doped crystal can be controlled by the amount and state of the JT complexes.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Gudkov VV,Sarychev MN,Zherlitsyn S,Zhevstovskikh IV,Averkiev NS,Vinnik DA,Gudkova SA,Niewa R,Dressel M,Alyabyeva LN,Gorshunov BP,Bersuker IBdoi
10.1038/s41598-020-63915-7subject
Has Abstractpub_date
2020-04-27 00:00:00pages
7076issue
1issn
2045-2322pii
10.1038/s41598-020-63915-7journal_volume
10pub_type
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