Microwave absorbing properties of La0.7Sr0.3MnO3 composites with negative magnetic susceptibility

R. B. Yang, C. Y. Tsay, W. F. Liang, C. K. Lin

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Abstract

The complex permittivity and permeability of La0.7Sr0.3MnO3La0.7Sr0.3MnO3 (LSMO)-epoxy composite absorbers are investigated in the microwave ranges from 2 to 18 GHz by transmission/reflection method. A negative magnetic susceptibility of perovskite oxides has been obtained in the frequency range of 4–18 GHz. By the use of the cavity perturbation technique, the negative magnetic susceptibility for 7.5–14 GHz is reconfirmed. For LSMO-epoxy composite with 80 wt % fillers, the maximum reflection loss can reach 23 dB at 10.5 GHz and the absorbing bandwidth above 10 dB is 1.5 GHz with 2 mm thickness.
Original languageEnglish
Number of pages1
JournalJournal of Applied Physics
Volume107
Issue number9
DOIs
Publication statusPublished - 2010

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magnetic permeability
microwaves
composite materials
fillers
absorbers
permeability
frequency ranges
permittivity
bandwidth
perturbation
cavities
oxides

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Microwave absorbing properties of La0.7Sr0.3MnO3 composites with negative magnetic susceptibility. / Yang, R. B.; Tsay, C. Y.; Liang, W. F.; Lin, C. K.

In: Journal of Applied Physics, Vol. 107, No. 9, 2010.

Research output: Contribution to journalArticle

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AU - Yang, R. B.

AU - Tsay, C. Y.

AU - Liang, W. F.

AU - Lin, C. K.

PY - 2010

Y1 - 2010

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AB - The complex permittivity and permeability of La0.7Sr0.3MnO3La0.7Sr0.3MnO3 (LSMO)-epoxy composite absorbers are investigated in the microwave ranges from 2 to 18 GHz by transmission/reflection method. A negative magnetic susceptibility of perovskite oxides has been obtained in the frequency range of 4–18 GHz. By the use of the cavity perturbation technique, the negative magnetic susceptibility for 7.5–14 GHz is reconfirmed. For LSMO-epoxy composite with 80 wt % fillers, the maximum reflection loss can reach 23 dB at 10.5 GHz and the absorbing bandwidth above 10 dB is 1.5 GHz with 2 mm thickness.

U2 - http://dx.doi.org/10.1063/1.3337685

DO - http://dx.doi.org/10.1063/1.3337685

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

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