Evolution of structural and magnetic properties of multifunctional bismuth iron garnets upon Ca and Y doping
| العنوان: | Evolution of structural and magnetic properties of multifunctional bismuth iron garnets upon Ca and Y doping |
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| المؤلفون: | Adrien Teurtrie, Laura Bocher, Niels Keller, Alexandre Gloter, Alexandra Mougin, E. Popova |
| المساهمون: | Laboratoire de Physique des Solides (LPS), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Groupe d'Etude de la Matière Condensée (GEMAC), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Physical Review Materials Physical Review Materials, American Physical Society, 2020, 4 (6), ⟨10.1103/PhysRevMaterials.4.064401⟩ |
| بيانات النشر: | HAL CCSD, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | [PHYS]Physics [physics], Materials science, Physics and Astronomy (miscellaneous), Doping, chemistry.chemical_element, 02 engineering and technology, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Epitaxy, 01 natural sciences, Pulsed laser deposition, Bismuth, Magnetization, symbols.namesake, Crystallography, chemistry, 0103 physical sciences, Faraday effect, symbols, Curie temperature, General Materials Science, Thin film, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, 0210 nano-technology |
| الوصف: | A multiscale approach is reported to understand the influence of the Ca and Y co-substitution in Bi-rich iron garnet thin films. Recently, it has been demonstrated that site-selective co-substitution of ${\mathrm{Ca}}^{2+}$ and ${\mathrm{Y}}^{3+}$ in bismuth iron garnet (BIG) leads to either $n$- or $p$-type semiconductor behavior. However, the evolution of the structural and magnetic properties of bismuth iron garnet upon doping is still unknown. In the (Ca,Y):BIG, thin films grown by pulsed laser deposition onto ${\mathrm{Gd}}_{3}{\mathrm{Ga}}_{5}{\mathrm{O}}_{12}$ substrates, structural investigations confirm the epitaxial growth of doped thin films with high crystallinity and a complete strain relaxation from 20 nm above the film/substrate interface. While x-ray diffraction only evidences a single-phase garnet, the presence of secondary phase nanocrystallites, that are absent in pure BIG grown in similar conditions, is observed by aberration-corrected scanning transmission electron microscopy. These nanocrystallites form in between garnet grains as textured and poorly crystallized hematite. Despite the presence of nanoneedles, Ca and Y co-substitution preserves the giant Faraday rotation of pure BIG and maintains the Curie temperature above 590 K. Only minor energy shifts (80 meV) or small intensity changes (10%) of the Faraday rotation are observed upon doping or annealing and are mainly related to band-gap evolution and cell volume change. Furthermore, the easy magnetization axis rotates towards in the out-of-plane direction upon doping which is also promising for potential applications in spintronics. |
| اللغة: | English |
| تدمد: | 2475-9953 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97246e7f1dc73eb84c4744a4efa2c669 https://hal.archives-ouvertes.fr/hal-02992690/document |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....97246e7f1dc73eb84c4744a4efa2c669 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 24759953 |
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