Spin-Wave Phase Inverter upon a Single Nanodefect

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Dobrovolskiy, OV (Author) Other; Sachser, R (Author) Other; Bunyaev, SA (Author) FCUP; Navas, D (Author) Other; Bevz, VM (Author) Other; Zelent, M (Author) Other; Smigaj, W (Author) Other; Rychly, J (Author) Other; Krawczyk, M (Author) Other; Vovk, RV (Author) Other; Huth, M (Author) Other; G.N. Kakazei (Author) FCUP

Journal

Title: ACS Applied Materials & Interfaces

Vol. 11 No. 6

ISSN: 1944-8244

Publisher: American Chemical Society

Indexing

ISI Web of Knowledge - 43 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00Q-M4Z

DOI: 10.1021/acsami.9b02717

Abstract (EN): Local modification of magnetic properties of nanoelements is a key to design future-generation magnonic devices in which information is carried and processed via spin waves. One of the biggest challenges here is to fabricate simple and miniature phase-controlling elements with broad tunability. Here, we successfully realize such spin-wave phase shifters upon a single nanogroove milled by a focused ion beam in a Co-Fe microsized magnonic waveguide. By varying the groove depth and the in-plane bias magnetic field, we continuously tune the spin-wave phase and experimentally evidence a complete phase inversion. The microscopic mechanism of the phase shift is based on the combined action of the nanogroove as a geometrical defect and the lower spin-wave group velocity in the waveguide under the groove where the magnetization is reduced due to the incorporation of Ga ions during the ion-beam milling. The proposed phase shifter can easily be on-chip integrated with spin-wave logic gates and other magnonic devices. Our findings are crucial for designing nanomagnonic circuits and for the development of spin-wave nano-optics.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9