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High-Temperature First-Order-Reversal-Curve (FORC) Study of Magnetic Nanoparticle Based Nanocomposite Materials

Published online by Cambridge University Press:  04 September 2017

B. Dodrill ,
P. Ohodnicki ,
M. McHenry  and
A. Leary
B. Dodrill*
Affiliation:
Lake Shore Cryotronics, Inc., 575 McCorkle Blvd., Westerville, OH, USA
P. Ohodnicki
Affiliation:
National Energy Technology Lab, 626 Cochrans Mill Road, Pittsburgh, PA, USA
M. McHenry
Affiliation:
Carnegie Mellon University, Materials Science and Engineering, 5000Forbes Ave., Pittsburgh, PA, USA
A. Leary
Affiliation:
Carnegie Mellon University, Materials Science and Engineering, 5000Forbes Ave., Pittsburgh, PA, USA
*
*(Email: brad.dodrill@lakeshore.com)
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Abstract

First-order-reversal-curves (FORCs) are an elegant, nondestructive tool for characterizing the magnetic properties of materials comprising fine (micron- or nano-scale) magnetic particles. FORC measurements and analysis have long been the standard protocol used by geophysicists and earth and planetary scientists investigating the magnetic properties of rocks, soils, and sediments. FORC can distinguish between single-domain, multi-domain, and pseudo single-domain behavior, and it can distinguish between different magnetic mineral species [1]. More recently, FORC has been applied to a wider array of magnetic material systems because it yields information regarding magnetic interactions and coercivity distributions that cannot be obtained from major hysteresis loop measurements alone. In this paper, we will discuss this technique and present high-temperature FORC results for two magnetic nanoparticle materials: CoFe nanoparticles dispersed in a SiO2 matrix, and FeCo-based nanocrystalline amorphous/nanocomposites.

Keywords

FerromagneticMagnetic propertiesNanoscale
Type
Articles
Information
MRS Advances , Volume 2 , Issue 49: International Materials Research Congress XXV , 2017 , pp. 2669 - 2674
Copyright
Copyright © Materials Research Society 2017 

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References

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