Seminaria

Seminarium wydziałowe

Dnia 2022.10.25 (wtorek) o godzinie 13.15, odbędzie się w sali 2011 Wydziału Fizyki seminarium na którym mgr Adam Krysztofik z Instytutu Fizyki Molekularnej PAN z Poznania wygłosi wykład:

„Magnetization dynamics of thin yttrium iron garnet films”

Serdecznie zapraszamy

Andrzej Maziewski

Jerzy Przeszowski

Yttrium iron garnet (Y3Fe5O12, YIG) is one of the compounds intensively investigated in terms of microwave and magnonic applications. This material is distinguished by its low damping of the magnetization precession enabling long-range propagation of spin waves (SWs). At the moment, it is predicted that information processing devices based on SWs will have significantly lower energy consumption compared to those based solely on electronic transport. Potential applications are therefore the main motivation for the undertaken research. During the seminar, the results of research on the structural and magnetic properties of thin YIG films will be presented. The variety of the systems will be discussed, regarding the choice of the substrate or the buffer layer: YIG/ Gd3Ga5O12, YIG / Y3Al5O12, YIG/SiOx, YIG / (Pt or Ir or Au film). Particular attention will be paid to the magnetization dynamics and its mutual relationship with the structural properties of the developed layers. First, the properties and SW propagation characteristics in the high-quality, epitaxial YIG films will be presented. Then, the relevance of the epitaxial strain and the thermal-induced stress will be discussed. Finally, it will be shown that YIG/metal bilayer may constitute a robust SW damper, applicable for SW conduit termination. References 1. Characterization of spin wave propagation in (111) YIG thin films with large anisotropy A. Krysztofik, H. Głowiński, P. Kuświk, S. Ziętek, L.E. Coy, J.N. Rychły, S. Jurga, T.W. Stobiecki, J. Dubowik Journal of Physics D: Applied Physics 50, 235004 (2017) DOI: 10.1088/1361-6463/aa6df0 2. Ultra-low damping in lift-off structured yttrium iron garnet thin films A. Krysztofik, L. E. Coy, P. Kuświk, K. Załęski, H. Głowiński, J. Dubowik Applied Physics Letters 111, 192404 (2017) DOI: 10.1063/1.5002004 3. Magnetization damping in nanocrystalline yttrium iron garnet thin films grown on oxidized silicon A. Krysztofik, S. Özoğlu, E. Coy IEEE Magnetics Letters 12, 7101605 (2021) DOI: 10.1109/LMAG.2021.3086454 4. Effect of strain‑induced anisotropy on magnetization dynamics in Y3Fe5O12 films recrystallized on a lattice‑mismatched substrate A. Krysztofik, S. Özoğlu, R.D. McMichael, E. Coy Scientific Reports 11, 14011 (2021) DOI: 10.1038/s41598-021-93308-3 5. Tuning of Magnetic Damping in Y3Fe5O12 / metal bilayers for spin-wave conduit termination A. Krysztofik, N. Kuznetsov, H. Qin, L. Flajšman, E. Coy, S. van Dijken Materials 15, 2814 (2022) DOI: 10.3390/ma15082814