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 E⊗e 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.

Details

Title
Sub-lattice of Jahn-Teller centers in hexaferrite crystal
Author
Gudkov, V V 1 ; Sarychev, M N 2 ; Zherlitsyn, S 3 ; Zhevstovskikh, I V 4 ; Averkiev, N S 5 ; Vinnik, D A 6 ; Gudkova, S A 7 ; Niewa, R 8   VIAFID ORCID Logo  ; Dressel, M 9   VIAFID ORCID Logo  ; Alyabyeva, L N 10   VIAFID ORCID Logo  ; Gorshunov, B P 10 ; Bersuker, I B 11 

1  Institute of Physics and Technology, Ural Federal University, Ekaterinburg, Russia (GRID:grid.412761.7) (ISNI:0000 0004 0645 736X); South Ural State University, Chelyabinsk, Russia (GRID:grid.440724.1) (ISNI:0000 0000 9958 5862) 
2  Institute of Physics and Technology, Ural Federal University, Ekaterinburg, Russia (GRID:grid.412761.7) (ISNI:0000 0004 0645 736X) 
3  Hochfeld-Magnetlabor Dresden (HLD-EMFL), Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany (GRID:grid.40602.30) (ISNI:0000 0001 2158 0612) 
4  Institute of Physics and Technology, Ural Federal University, Ekaterinburg, Russia (GRID:grid.412761.7) (ISNI:0000 0004 0645 736X); M.N. Miheev Institute of Metal Physics, UB of the RAS, Ekaterinburg, Russia (GRID:grid.412761.7) 
5  A.F. Ioffe Physical Technical Institute of the RAS, St. Petersburg, Russia (GRID:grid.423485.c) (ISNI:0000 0004 0548 8017) 
6  South Ural State University, Chelyabinsk, Russia (GRID:grid.440724.1) (ISNI:0000 0000 9958 5862) 
7  South Ural State University, Chelyabinsk, Russia (GRID:grid.440724.1) (ISNI:0000 0000 9958 5862); Moscow Institute of Physics and Technology (State University), Dolgoprudny, Russia (GRID:grid.18763.3b) (ISNI:0000000092721542) 
8  University of Stuttgart, Institute of Inorganic Chemistry, Stuttgart, Germany (GRID:grid.5719.a) (ISNI:0000 0004 1936 9713) 
9  Moscow Institute of Physics and Technology (State University), Dolgoprudny, Russia (GRID:grid.18763.3b) (ISNI:0000000092721542); 1. Physikalisches Institut, Universität Stuttgart, Stuttgart, Germany (GRID:grid.5719.a) (ISNI:0000 0004 1936 9713) 
10  Moscow Institute of Physics and Technology (State University), Dolgoprudny, Russia (GRID:grid.18763.3b) (ISNI:0000000092721542) 
11  the University of Texas at Austin, Institute for Theoretical Chemistry, Austin, USA (GRID:grid.89336.37) (ISNI:0000 0004 1936 9924) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-020-63915-7
ProQuest document ID
2395250496
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.