Magnetic properties of disordered polycrystalline bulk Sm$ _{2} $NiMnO$ _{6} $ double perovskite
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| Format: | Preprint |
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2022
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| _version_ | 1866915408443867136 |
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| author | Majumder, S. Tripathi, M. Rajput, P. Jha, S. N. Choudhary, R. J. Phase, D. M. |
| author_facet | Majumder, S. Tripathi, M. Rajput, P. Jha, S. N. Choudhary, R. J. Phase, D. M. |
| contents | The structural, electronic and magnetic properties of anti-site disordered Sm$ _{2} $NiMnO$ _{6} $ double perovskite has been studied. RE$_{2}$NiMnO$_{6}$ (RE: rare-earth) ordered double perovskite is commonly believed to show two distinct magnetic phase transitions viz, paramagnetic to ferromagnetic (FM) transition at T = T$ _{C} $ due to Ni-O-Mn super exchange interaction and another transition at T = T$ _{d} $ due to coupling of RE spins with Ni-Mn network. In our present study, we have observed that the presence of intrinsic B-site disorder results in an additional antiferromagnetic (AFM) coupling, mediated via Ni-O-Ni and Mn-O-Mn local bond pairs. As a consequence, the magnetic behavior of SNMO comprises of co-existing FM-AFM phases, which are respectively governed by the anti-site ordered and disordered structures. Field dependent inverted cusp like trend in M(T) and two step reversible loop behavior in M(H) measurements indicate the presence of competing FM-AFM phases over a wide range of temperature values (T$ _{d} < $ T $ < $ T$ _{C} $). |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2204_14248 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Magnetic properties of disordered polycrystalline bulk Sm$ _{2} $NiMnO$ _{6} $ double perovskite Majumder, S. Tripathi, M. Rajput, P. Jha, S. N. Choudhary, R. J. Phase, D. M. Materials Science The structural, electronic and magnetic properties of anti-site disordered Sm$ _{2} $NiMnO$ _{6} $ double perovskite has been studied. RE$_{2}$NiMnO$_{6}$ (RE: rare-earth) ordered double perovskite is commonly believed to show two distinct magnetic phase transitions viz, paramagnetic to ferromagnetic (FM) transition at T = T$ _{C} $ due to Ni-O-Mn super exchange interaction and another transition at T = T$ _{d} $ due to coupling of RE spins with Ni-Mn network. In our present study, we have observed that the presence of intrinsic B-site disorder results in an additional antiferromagnetic (AFM) coupling, mediated via Ni-O-Ni and Mn-O-Mn local bond pairs. As a consequence, the magnetic behavior of SNMO comprises of co-existing FM-AFM phases, which are respectively governed by the anti-site ordered and disordered structures. Field dependent inverted cusp like trend in M(T) and two step reversible loop behavior in M(H) measurements indicate the presence of competing FM-AFM phases over a wide range of temperature values (T$ _{d} < $ T $ < $ T$ _{C} $). |
| title | Magnetic properties of disordered polycrystalline bulk Sm$ _{2} $NiMnO$ _{6} $ double perovskite |
| topic | Materials Science |
| url | https://arxiv.org/abs/2204.14248 |