Determination of demagnetizing factors using first-order reversal curves and ferromagnetic resonance
Publication Date
1-1-2020
Document Type
Article
Publication Title
AIP Advances
Volume
10
Issue
1
DOI
10.1063/1.5129969
Abstract
We present a method to quantitatively analyze magnetizing or demagnetizing interactions in arrayed nano-magnets by combining first-order reversal curve (FORC) and ferromagnetic resonance (FMR) measurement data. We develop a function to predict the resulting FORC distribution given: (1) a Gaussian intrinsic distribution in terms of the internal field and (2) a mean interaction field proportional to the sample's magnetic moment. We then perform least-squares regression of our model on experimental FORC measurements of a nanowire array and of a thin film. Combining the obtained interaction field with an FMR fit result allows us to algebraically solve for the effective axial and transverse demagnetizing factors. Our experimental demagnetizing factors agree with expected values and provide quantitative evidence of the demagnetizing interaction between nanowires in an array.
Funding Number
1827433
Funding Sponsor
National Science Foundation
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Department
Physics and Astronomy
Recommended Citation
K. S. Muster and R. Heindl. "Determination of demagnetizing factors using first-order reversal curves and ferromagnetic resonance" AIP Advances (2020). https://doi.org/10.1063/1.5129969
Comments
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