دورية أكاديمية
Order-to-Disorder Transition and Hydrogen Bonding in the Jahn-Teller Active NH
| العنوان: | Order-to-Disorder Transition and Hydrogen Bonding in the Jahn-Teller Active NH |
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| المؤلفون: | Fjellvåg, Øystein S, Gonano, Bruno, Bernal, Fabian L M, Amedi, Salah B, Lyu, Jike, Pomjakushin, Vladimir, Medarde, Marisa, Chernyshov, Dmitry, Marshall, Kenneth, Valldor, Martin, Fjellvåg, Helmer, Hauback, Bjørn C |
| المصدر: | Inorg Chem ; ISSN:1520-510X ; Volume:63 ; Issue:23 |
| بيانات النشر: | American Chemical Society |
| سنة النشر: | 2024 |
| المجموعة: | PubMed Central (PMC) |
| الوصف: | Large quantities of high-purity NH4CrF3 have been synthesized using a wet-chemical method, and its structural chemistry and magnetic properties are investigated in detail for the first time. NH4CrF3 is a tetragonal fluoroperovskite that displays an ordering of the ammonium (NH4+) groups at room temperature and C-type orbital ordering. The ammonium groups order and display distinct signs of hydrogen bonds to nearby fluoride anions by buckling the Cr-F-Cr angle away from 180°. The ammonium ordering remains up to 405 K, much higher than in other ammonium fluoroperovskites, indicating a correlation between the flexibility of the Jahn-Teller ion, the hydrogen bond formation, and the ammonium ordering. At 405 K, an order-to-disorder transition occurs, where the ammonium groups disorder, corresponding to a transition to higher symmetry. This is accompanied by a contraction of the unit cell from breaking hydrogen bonds, similar to the phenomenon observed in water ice melting. The compound orders antiferromagnetically with a Neél temperature of 60 K, an effective paramagnetic moment of 4.3 μB, and a Weiss temperature of -33 K. An A-type antiferromagnetic structure is identified by neutron diffraction, with an ordered moment of 3.72(2) μB. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | https://doi.org/10.1021/acs.inorgchem.4c00931Test; https://pubmed.ncbi.nlm.nih.gov/38787284Test; https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11167635Test/ |
| DOI: | 10.1021/acs.inorgchem.4c00931 |
| الإتاحة: | https://doi.org/10.1021/acs.inorgchem.4c00931Test https://pubmed.ncbi.nlm.nih.gov/38787284Test https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11167635Test/ |
| رقم الانضمام: | edsbas.80E3FD3F |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acs.inorgchem.4c00931 |
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