Electric-field-induced parametric excitation of exchange magnons in a CoFeB/MgO junction

Autor:	Deka, Angshuman, Rana, Bivas, Anami, Ryo, Miura, Katsuya, Takahashi, Hiromasa, Otani, YoshiChika, Fukuma, Yasuhiro
Rok vydání:	2021
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
Popis:	Electric-field controlled magnetization dynamics is an important integrant in low power spintronic devices. In this letter, we demonstrate electric-field induced parametric excitation for CoFeB/MgO junctions by using interfacial in-plane magnetic anisotropy. When the in-plane magnetic anisotropy and the external magnetic field are parallel to each other, magnons are efficiently excited by using electric-field induced parametric excitation. Its wavelength and wavenumber are tuned by changing input power and frequency of the applied voltage. A generalized phenomenological model is developed to explain the underlying role of the electric-field torque. Electrical excitation with no Joule heating offers a good opportunity for developing magnonic devices and exploring various nonlinear dynamics in magnetic systems. Comment: 10 pages, 5 figures, currently under review
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2112.12308 Zobrazit plný text záznamu View this record from Arxiv