Gadolinium silicide (Gd5Si4) nanoparticles for tuneable broad band microwave absorption

Bora, Pritom J.; Harstad, S. M.; Gupta, S.; Pecharsky, V. K.; Vinoy, K. J.; Ramamurthy, Praveen C.; Hadimani, R. L.

doi:10.1088/2053-1591/aafd55

Title: Gadolinium silicide (Gd₅Si₄) nanoparticles for tuneable broad band microwave absorption

Journal Article · Thu Jan 10 00:00:00 EST 2019 · Materials Research Express (Online)

DOI:https://doi.org/10.1088/2053-1591/aafd55· OSTI ID:1501618

Bora, Pritom J. ^[1]; Harstad, S. M. ^[2]; Gupta, S. ^[3];

^[4]; Vinoy, K. J. ^[1];

^[1]; Hadimani, R. L. ^[5]

Indian Institute of Science (India)
Virginia Commonwealth Univ., Richmond, VA (United States)
Ames Lab., Ames, IA (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States)
Virginia Commonwealth Univ., Richmond, VA (United States); Iowa State Univ., Ames, IA (United States)

We report that soft magnetic Gd₅Si₄ nanoparticles exhibit excellent microwave absorption in the Ku-band (12.4-18 GHz) when dispersed in poly (dimethyl siloxane), PDMS. The minimum experimentally recorded reflection loss (RL) of Gd₅Si₄-PDMS nanocomposite is -69 dB, with a large bandwidth for a single 6 mm-thick layer. The bandwidth can be further extended by using a novel design where 1 mm-thick layers of the nanocomposite are arranged into a modified pyramid-shaped absorber. Standard electromagnetic (EM) simulations confirm experimental results.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1501618

Report Number(s):: IS-J-9907

Journal Information:: Materials Research Express (Online), Vol. 6, Issue 5; ISSN 2053-1591

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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