Unveiling Photoluminescence Signatures of Magneto-Optical Coupling in Layered Hybrid Manganese Chloride Perovskites
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| Natura: | Preprint |
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2026
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| author | Asensio, Yaiza Mattioni, Samuele Vaquero, Daniel Cordero-Silis, Cédric A. Jalali, Houman Bahmani Marchelli, Dorwal Gobbi, Marco Casanova, Fèlix Di Stasio, Francesco Guimarães, Marcos H. D. Hueso, Luis E. Martín-García, Beatriz |
| author_facet | Asensio, Yaiza Mattioni, Samuele Vaquero, Daniel Cordero-Silis, Cédric A. Jalali, Houman Bahmani Marchelli, Dorwal Gobbi, Marco Casanova, Fèlix Di Stasio, Francesco Guimarães, Marcos H. D. Hueso, Luis E. Martín-García, Beatriz |
| contents | Understanding the interplay between magnetic ordering and light emission is crucial for developing magneto-optical technologies. However, this phenomenon is poorly understood since observations of this coupling vary significantly across materials. In this context, hybrid organic-inorganic metal halide perovskites (HOIPs) that incorporate Mn2+ ions are a chemically and structurally tunable platform for exploring this phenomenon, since they exhibit magnetic ordering and photoluminescence (PL) emission. Here, we study two antiferromagnetic Mn-based HOIPs with different organic cations that result in distinct lattice stiffness, Mn2+-Mn2+ distance and octahedral distortion. Temperature-dependent PL excitation spectroscopy reveals changes in crystal field splitting energy and Racah parameters well above the Néel temperature (TN), indicating the emergence of Mn2+-Mn2+ magnetic interactions prior to reach long-range magnetic ordering. These variations align with the observed changes in temperature-PL evolution. The compound with a more rigid lattice shows stronger changes closer to TN, suggesting combined effects of magnetic polarons and spin-canting. In contrast, magnetic polaron-induced magnetic modifications prevail in the HOIP with a softer lattice. These results reveal the complexity of the magneto-optical coupling in Mn-based HOIPs and provide new insights into this field extensible to other 2D materials that exhibit this phenomenon with potential for advanced magneto-optical applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_17324 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Unveiling Photoluminescence Signatures of Magneto-Optical Coupling in Layered Hybrid Manganese Chloride Perovskites Asensio, Yaiza Mattioni, Samuele Vaquero, Daniel Cordero-Silis, Cédric A. Jalali, Houman Bahmani Marchelli, Dorwal Gobbi, Marco Casanova, Fèlix Di Stasio, Francesco Guimarães, Marcos H. D. Hueso, Luis E. Martín-García, Beatriz Materials Science Other Condensed Matter Understanding the interplay between magnetic ordering and light emission is crucial for developing magneto-optical technologies. However, this phenomenon is poorly understood since observations of this coupling vary significantly across materials. In this context, hybrid organic-inorganic metal halide perovskites (HOIPs) that incorporate Mn2+ ions are a chemically and structurally tunable platform for exploring this phenomenon, since they exhibit magnetic ordering and photoluminescence (PL) emission. Here, we study two antiferromagnetic Mn-based HOIPs with different organic cations that result in distinct lattice stiffness, Mn2+-Mn2+ distance and octahedral distortion. Temperature-dependent PL excitation spectroscopy reveals changes in crystal field splitting energy and Racah parameters well above the Néel temperature (TN), indicating the emergence of Mn2+-Mn2+ magnetic interactions prior to reach long-range magnetic ordering. These variations align with the observed changes in temperature-PL evolution. The compound with a more rigid lattice shows stronger changes closer to TN, suggesting combined effects of magnetic polarons and spin-canting. In contrast, magnetic polaron-induced magnetic modifications prevail in the HOIP with a softer lattice. These results reveal the complexity of the magneto-optical coupling in Mn-based HOIPs and provide new insights into this field extensible to other 2D materials that exhibit this phenomenon with potential for advanced magneto-optical applications. |
| title | Unveiling Photoluminescence Signatures of Magneto-Optical Coupling in Layered Hybrid Manganese Chloride Perovskites |
| topic | Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2602.17324 |