Abstract
We present a microscopic study of the electronic and magnetic properties of the spin ladder systems Sr\(_{2}\)Fe\(_{3}\)Ch\(_{2}\)O\(_{3}\) (Ch=S, Se) based on density functional calculations and on ab initio-derived effective models. We discuss explicitly the nature of the exchange paths and provide quantitative estimates of magnetic exchange couplings. Although both compounds have similar crystal structures, the values of magnetic exchange interactions are slightly greater for S compound than Se compound. A microscopic modelling based on analysis of the electronic structure of these systems put Sr\(_{2}\)Fe\(_{3}\)Ch\(_{2}\)O\(_{3}\) (Ch=S, Se) in the interesting class of 2-D AFM spin, S = 2 ladder systems.
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This manuscript has no associated data or the data will not be deposited. [Authors’ comment: First of all, this is a purely computational work, and all the data (processed) related to this work is already provided in the form of figures and tables within this article. Only raw data are kept with the authors. Because of this, we chose this option of no data/data will not be deposited while submitting the manuscript.].
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Acknowledgements
We acknowledge DSTBT, Govt. of West Bengal for support of Basic Research through Grant vide Memo No. 463(Sanc.)/ST/P/S&T/16G-5/2018 dated 14/03/2019. We also acknowledge the support of the Aliah University for providing the computational facilities.
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BR is solely responsible for the problem formulation, direction, data analysis and wrote the manuscript. DK has performed the first principle calculation, specially magnetic properties of these systems using VASP. AI has performed the structural analysis. JA has also performed the first principle calculation, specially electronic properties of these systems using LMTO.
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Rahaman, B., Khanam, D., Iqbal, A. et al. Comparative study of Sr\(_{2}\text {Fe}_{3}\text {Ch}_{2}\text {O}_{3}\)(Ch=S, Se): 2-D AFM spin S = 2 ladder systems. Eur. Phys. J. B 94, 109 (2021). https://doi.org/10.1140/epjb/s10051-021-00109-8
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DOI: https://doi.org/10.1140/epjb/s10051-021-00109-8