Low spin-wave damping in amorphous Co40Fe40B20 thin films

A characterization of the magnetic properties of amorphous Co40Fe40B20 thin films, developed for low damping applications in magnon spintronics, using vector network analyzer ferromagnetic resonance (VNA-FMR) and the magneto-optical Kerr effect is presented. Our films show a very weak uniaxial anisotropy and a low Gilbert damping parameter (⁠⁠). The saturation magnetization extracted from the FMR measurements is 1250 kA/m. The frequency dependence of the first perpendicular standing spin waves mode on the applied magnetic field is used to determine the exchange constant A for this alloy resulting in a value of ⁠. These values are discussed in comparison to literature values for different CoFeB compositions and other related alloys.

Metadaten
Author:	Andres Conca ORCiD, Jochen Greser, Thomas Sebastian, Stephan Klingler, Björn Obry, Britta Leven, Burkard Hillebrands
URN:	urn:nbn:de:hbz:386-kluedo-86621
Parent Title (English):	Journal of Applied Physics
Publisher:	AIP Publishing
Document Type:	Article
Language of publication:	English
Date of Publication (online):	2013/06/07
Year of first Publication:	2013
Publishing Institution:	Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau
Date of the Publication (Server):	2025/02/03
Tag:	CoFeB; damping
Issue:	113, 213909 (2013)
Page Number:	5
Source:	10.1063/1.4808462
Faculties / Organisational entities:	Kaiserslautern - Fachbereich Physik
DDC-Cassification:	5 Naturwissenschaften und Mathematik / 530 Physik
PACS-Classification (physics):	70.00.00 CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES
Licence (German):	Lizenz nach Originalpublikation