Anomalies of ESR spectra of the La2NiO4+δ system
| العنوان: | Anomalies of ESR spectra of the La2NiO4+δ system |
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| المؤلفون: | Nathalie Poirot, Philippe Odier, Patrick Simon |
| المساهمون: | GREMAN (matériaux, microélectronique, acoustique et nanotechnologies) (GREMAN - UMR 7347), Institut National des Sciences Appliquées - Centre Val de Loire (INSA CVL), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours-Centre National de la Recherche Scientifique (CNRS), Centre de recherches sur les matériaux à haute température (CRMHT), Centre National de la Recherche Scientifique (CNRS), Conditions Extrêmes et Matériaux : Haute Température et Irradiation (CEMHTI), Université d'Orléans (UO)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Magnétisme et Supraconductivité (MagSup), Institut Néel (NEEL), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université de Tours (UT)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université d'Orléans (UO) |
| المصدر: | Solid State Sciences Solid State Sciences, Elsevier, 2008, 10, pp.186-192. ⟨10.1016/j.solidstatesciences.2007.08.015⟩ |
| بيانات النشر: | Elsevier BV, 2008. |
| سنة النشر: | 2008 |
| مصطلحات موضوعية: | Condensed matter physics, Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 02 engineering and technology, General Chemistry, Magnetic semiconductor, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Polaron, 01 natural sciences, Ferromagnetic resonance, law.invention, Condensed Matter::Materials Science, Charge ordering, Ferromagnetism, law, 0103 physical sciences, Condensed Matter::Strongly Correlated Electrons, General Materials Science, 010306 general physics, 0210 nano-technology, Electron paramagnetic resonance, Local field, ComputingMilieux_MISCELLANEOUS, Phase diagram |
| الوصف: | X- and Q-band ESR experiments on ceramics and single crystals of La 2 NiO 4+ δ (0.03 ≤ δ ≤ 0.17) are reported. The observed intrinsic ESR signals were interpreted in terms of ferromagnetic resonance of isolated oxidized nickel species in the lattice. The origin of the ferromagnetic component differs according to the δ value, consistent with the phase diagram and the phenomenon of charge and spin order. The ESR spectra on powders exhibit an anisotropic signal attributed to the presence of a magnetic local field, induced by the external magnetic field applied during the first ESR measurement. For specific value of δ , the ESR spectra show a “multilines signal” from the origin which could be due to the presence of magnetic polarons which are pinned on the surface. An ESR study vs. temperature for a powder sample with δ = 0.16 shows that the linewidth evolution is in relation with the transition from a dynamic stripe to a static stripe state at 160 K. At high temperature ( T > 600 K), a polaronic liquid is observed. |
| تدمد: | 1293-2558 |
| DOI: | 10.1016/j.solidstatesciences.2007.08.015 |
| DOI: | 10.1016/j.solidstatesciences.2007.08.015⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d17a260cc0da8cf973ef8fa1090a53c9 https://doi.org/10.1016/j.solidstatesciences.2007.08.015 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi.dedup.....d17a260cc0da8cf973ef8fa1090a53c9 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 12932558 |
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| DOI: | 10.1016/j.solidstatesciences.2007.08.015 |