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High-Permeability Particles for Magnetic Composites

Published online by Cambridge University Press:  26 February 2011

Robert Sailer ,
Pamela J Jeppson ,
Eric L Jarabek ,
Joseph A Sandstrom ,
Zoha Al-Badri ,
Dean G Grier ,
Anthony N Caruso ,
Philip R Boudjouk ,
Pete Eames  and
Mark Tondra
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Robert Sailer
Affiliation:
rob.sailer@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Pamela J Jeppson
Affiliation:
pamela.jeppson@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Eric L Jarabek
Affiliation:
eric.jarabek@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Joseph A Sandstrom
Affiliation:
joseph.sandstrom@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Zoha Al-Badri
Affiliation:
zoha.albadri@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Dean G Grier
Affiliation:
dean.grier@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Anthony N Caruso
Affiliation:
anthony.caruso@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
Philip R Boudjouk
Affiliation:
philip.boudjouk@ndsu.edu, North Dakota State University, Research, Creative Activities and Tech Transfer, United States
Pete Eames
Affiliation:
peames@nve.com, NVE, United States
Mark Tondra
Affiliation:
markt@nve.com, NVE, United States
Douglas L Schulz
Affiliation:
doug.schulz@ndsu.edu, North Dakota State University, Center for Nanoscale Science and Engineering, United States
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Abstract

Electromagnetic shields and flux concentrators for magnetic sensors could utilize flexible and insulating composites applied using simple thin film deposition methods such as dip-coating, spin-coating, spraying, etc. As the first step towards development of composites with superior performance, efforts focused on isolating nanoparticles with large magnetizations under low fields. In this paper, we provide the results of proof-of-concept studies for two systems: metal-functionalized silicone-based materials (metal-silicone); and, Co-ferrite (Co2+1−xFe2+xFe3+2O4) nanoparticles. The metal-silicone materials studied included a polysiloxane that contained a pendant ferrocene where an optimum saturization magnetization of 5.9 emu/g (coercivity = 11 Oe) was observed. Co-ferrite nanoparticle samples prepared in this study showed unprecendented saturation magnetization (i.e., Ms > 150 emu/g) with low coercivity (Hc ∼ 10 Oe) at room temperature and offer potential application as flux concentrators.

Keywords

magnetic propertiesnanoscaleparticulate
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 906: Symposium HH – Magnetic Sensors and Sensing Systems , 2005 , 0906-HH01-06
Copyright
Copyright © Materials Research Society 2006

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