Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Ferromagnetic Resonance Detection with a Torsion-mode Atomic-force Microscope

Published

Author(s)

M. Loehndorf, John M. Moreland, Pavel Kabos

Abstract

We have developed a ferromagnetic resonance (FMR) instrument based on a torsion-mode atomic-force microscope (AFM). The instrument measures the torque on a magnetized thin film in a static out-of-plane field perpendicular to the film surface. The magnetic film is deposited outo an AFM microcantilever. FMR measurements are performed at a fixed microwave frequency of 9.15 GHz with a sweeping in-plane field. At the FMR condition, the change in the average in-plane magnetization of the film is at a maximum corresponding to a maximum change in the torque on the AFM cantilever. Our instrument is capable of measuring fluctuations of in-plane magnetization of 63.3 A/m of NiFe film samples with a total volume of 1.1x10-10 cm3. Given a signal-to-noise ratio of 40, we estimate a magnetic moment sensitivity of 1.7 x 10-16 A/m2.
Citation
Applied Physics Letters
Volume
76
Issue
9

Keywords

atomic force microscope, ferromagnetic resonance (FMR), instrument measures the torque, magnetization fluctuations microcantilev

Citation

Loehndorf, M. , Moreland, J. and Kabos, P. (2000), Ferromagnetic Resonance Detection with a Torsion-mode Atomic-force Microscope, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=6022 (Accessed October 6, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created January 31, 2000, Updated October 12, 2021