Anisotropy-assisted magnon condensation in ferromagnetic thin films

Autor:	Frostad, Therese, Pirro, Philipp, Serga, Alexander A., Hillebrands, Burkard, Brataas, Arne, Qaiumzadeh, Alireza
Rok vydání:	2023
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Phys. Rev. Research 6, L012011 (2024)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevResearch.6.L012011
Popis:	We theoretically demonstrate that adding an easy-axis magnetic anisotropy facilitates magnon condensation in thin yttrium iron garnet (YIG) films. Dipolar interactions in a quasi-equilibrium state stabilize room-temperature magnon condensation in YIG. Even though the out-of-plane easy-axis anisotropy generally competes with the dipolar interactions, we show that adding such magnetic anisotropy may even assist the generation of the magnon condensate electrically via the spin transfer torque mechanism. We use analytical calculations and micromagnetic simulations to illustrate this effect. Our results may explain the recent experiment on Bi-doped YIG and open a pathway toward applying current-driven magnon condensation in quantum spintronics. Comment: 5 pages + SM, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2309.05982 Zobrazit plný text záznamu View this record from Arxiv