High Quality Yttrium Iron Garnet Grown by Room Temperature Pulsed Laser Deposition and Subsequent Annealing
| Autor: | Hauser, C., Richter, T., Homonnay, N., Eisenschmidt, C., Deniz, H., Hesse, D., Ebbinghaus, S., Schmidt, G. |
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| Rok vydání: | 2015 |
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| Druh dokumentu: | Working Paper |
| Popis: | We have investigated recrystallization of amorphous Yttrium Iron Garnet (YIG) by annealing in oxygen atmosphere. Our findings show that well below the melting temperature the material transforms into a fully epitaxial layer with exceptional quality, both structural and magnetic.\\ In ferromagnetic resonance (FMR) ultra low damping and extremely narrow linewidth can be observed. For a 56 nm thick layer a damping constant of $\alpha$=(6.63$\pm$1.50)$\cdot$10$^{-5}$ is found and the linewidth at 9.6 GHz is as small as 1.30$\pm$0.05 Oe which are the lowest values for PLD grown thin films reported so far. Even for a 20 nm thick layer a damping constant of $\alpha$=(7.51$\pm$1.40)$\cdot$10$^{-5}$ is found which is the lowest value for ultrathin films published so far. The FMR linewidth in this case is 3.49$\pm$0.10 Oe at 9.6 GHz. Our results not only present a method of depositing thin film YIG of unprecedented quality but also open up new options for the fabrication of thin film complex oxides or even other crystalline materials. Comment: 13 pages, 4 figures |
| Databáze: | arXiv |
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