Measurement of magnetism in composite materials

Bernardo Tellini; Mauro Bologna; Alessandra Petri

doi:10.1109/TIM.2009.2017653

Measurement of magnetism in composite materials

Bernardo Tellini
, Mauro Bologna
, Alessandra Petri

Department of Electrical-Electronic Engineering

University of Pisa
University of North Texas
G.S.D. s.r.l.

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

This paper focuses on the measurement of the effective magnetic permeability μ_eff in composite structures built from nonmagnetic materials. Starting from recent studies of magnetism in microstructures, we present the results of a new theoretical and experimental analysis performed at frequencies below the medium frequencies. Mainly, we focus on how "spatial averaging"can affect the estimation of the parameter μ_eff and show how expressions of μ_eff derived for a single "unit-cell"configuration find analogy with that relevant to composite structured arrays. Finally, we show how to obtain negative values of μ_eff for composite materials in the industrial frequency range and make some remarks on how future technologies can impact on the measurement of magnetism in composite materials.

Original language	English
Pages (from-to)	3411-3417
Number of pages	7
Journal	IEEE Transactions on Instrumentation and Measurement
Volume	58
Issue number	10
DOIs	https://doi.org/10.1109/TIM.2009.2017653
State	Published - 2009

Keywords

Circuit modeling
Composite materials
Effective permeability
Experimental analysis
Spatial averaging
Theoretical study

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10.1109/TIM.2009.2017653

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AU - Tellini, Bernardo

AU - Bologna, Mauro

AU - Petri, Alessandra

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AB - This paper focuses on the measurement of the effective magnetic permeability μeff in composite structures built from nonmagnetic materials. Starting from recent studies of magnetism in microstructures, we present the results of a new theoretical and experimental analysis performed at frequencies below the medium frequencies. Mainly, we focus on how "spatial averaging"can affect the estimation of the parameter μeff and show how expressions of μeff derived for a single "unit-cell"configuration find analogy with that relevant to composite structured arrays. Finally, we show how to obtain negative values of μeff for composite materials in the industrial frequency range and make some remarks on how future technologies can impact on the measurement of magnetism in composite materials.

KW - Circuit modeling

KW - Composite materials

KW - Effective permeability

KW - Experimental analysis

KW - Spatial averaging

KW - Theoretical study

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SP - 3411

EP - 3417

JO - IEEE Transactions on Instrumentation and Measurement

JF - IEEE Transactions on Instrumentation and Measurement

IS - 10

ER -

Measurement of magnetism in composite materials

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Keywords

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