تقرير
Giant Electrostatic Modification of Magnetism via Electrolyte-Gate-Induced Cluster Percolation in La$_{1-x}$Sr$_x$CoO$_{3-\delta}$
| العنوان: | Giant Electrostatic Modification of Magnetism via Electrolyte-Gate-Induced Cluster Percolation in La$_{1-x}$Sr$_x$CoO$_{3-\delta}$ |
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| المؤلفون: | Walter, Jeff, Charlton, T., Ambaye, H., Fitzsimmons, M. R., Orth, Peter P., Fernandes, R. M., Leighton, Chris |
| المصدر: | Phys. Rev. Materials 2, 111406 (2018) |
| سنة النشر: | 2018 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons, Condensed Matter - Materials Science |
| الوصف: | Electrical control of magnetism is a long-standing goal in physics and technology, recently developed electrolyte gating techniques providing a promising route to realization. Validating a recent theoretical prediction, here we demonstrate large enhancement of electrostatic modulation of ferromagnetic order in ion-gel-gated ultrathin La$_{0.5}$Sr$_{0.5}$CoO$_{3-\delta}$ by thickness-tuning to the brink of a magnetic percolation transition. Application of only 3-4 V then drives a transition from a short-range-ordered insulator to a robust long-range ferromagnetic metal, realizing giant electrostatic Curie temperature modulation over a 150 K window. In operando polarized neutron reflectometry confirms gate-controlled ferromagnetism, also demonstrating unusually deep penetration of induced magnetization, in further agreement with theory. Comment: 3 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevMaterials.2.111406 |
| URL الوصول: | http://arxiv.org/abs/1807.09364 |
| رقم الأكسشن: | edsarx.1807.09364 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevMaterials.2.111406 |
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