Anisotropy of exchange interactions in honeycomb ladder compound ReCl5
| Autor: | Vorobyova, A. A., Boltalin, A. I., Tsymbarenko, D. M., Morozov, I. V., Vasilchikova, T. M., Gapontsev, V. V., Lyssenko, K. A., Demishev, S. V., Semeno, A. V., Streltsov, S. V., Volkova, O. S. |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The Re5+(5d2) compounds possess large spin-orbital interaction which urges for large anisotropy, non-collinear structures and other phenomena. Here we present ReCl5 composed by separate Re2Cl10 units formed by edge-shared chlorine octahedra. It demonstrates the formation of antiferromagnetically ordered state in two steps at TN1 = 35.5 K and TN2 = 13.2 K seen in dc-, ac-magnetic susceptibility and in specific heat. At 4K it can be transformed to the state with spontaneous magnetic moment by relatively weak magnetic field m0H = 0.5 T via metamagnetic phase transition. Ab initio calculations give anisotropic ferromagnetic exchange interactions J1 and J2 within and between rhenium pairs forming the zig-zag chains along the a-axis. Pairs of zig-zag chains are coupled by ferromagnetic interaction J3 along the c-axis into magnetic honeycomb ladders. The ladders are coupled by significantly weaker interaction J4. Comment: 11 pages, 8 figures |
| Databáze: | arXiv |
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