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

Abstract

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.

Authors:
 [1];  [2];  [3]; ORCiD logo [4];  [1]; ORCiD logo [1];  [5]
  1. Indian Institute of Science (India)
  2. Virginia Commonwealth Univ., Richmond, VA (United States)
  3. Ames Lab., Ames, IA (United States)
  4. Ames Lab. and Iowa State Univ., Ames, IA (United States)
  5. Virginia Commonwealth Univ., Richmond, VA (United States); Iowa State Univ., Ames, IA (United States)
Publication Date:
Research Org.:
Ames Lab., Ames, IA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division
OSTI Identifier:
1501618
Report Number(s):
IS-J-9907
Journal ID: ISSN 2053-1591
Grant/Contract Number:  
AC02-07CH11358
Resource Type:
Accepted Manuscript
Journal Name:
Materials Research Express (Online)
Additional Journal Information:
Journal Name: Materials Research Express (Online); Journal Volume: 6; Journal Issue: 5; Journal ID: ISSN 2053-1591
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Bora, Pritom J., Harstad, S. M., Gupta, S., Pecharsky, V. K., Vinoy, K. J., Ramamurthy, Praveen C., and Hadimani, R. L. Gadolinium silicide (Gd5Si4) nanoparticles for tuneable broad band microwave absorption. United States: N. p., 2019. Web. doi:10.1088/2053-1591/aafd55.
Bora, Pritom J., Harstad, S. M., Gupta, S., Pecharsky, V. K., Vinoy, K. J., Ramamurthy, Praveen C., & Hadimani, R. L. Gadolinium silicide (Gd5Si4) nanoparticles for tuneable broad band microwave absorption. United States. doi:https://doi.org/10.1088/2053-1591/aafd55
Bora, Pritom J., Harstad, S. M., Gupta, S., Pecharsky, V. K., Vinoy, K. J., Ramamurthy, Praveen C., and Hadimani, R. L. Thu . "Gadolinium silicide (Gd5Si4) nanoparticles for tuneable broad band microwave absorption". United States. doi:https://doi.org/10.1088/2053-1591/aafd55. https://www.osti.gov/servlets/purl/1501618.
@article{osti_1501618,
title = {Gadolinium silicide (Gd5Si4) nanoparticles for tuneable broad band microwave absorption},
author = {Bora, Pritom J. and Harstad, S. M. and Gupta, S. and Pecharsky, V. K. and Vinoy, K. J. and Ramamurthy, Praveen C. and Hadimani, R. L.},
abstractNote = {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.},
doi = {10.1088/2053-1591/aafd55},
journal = {Materials Research Express (Online)},
number = 5,
volume = 6,
place = {United States},
year = {2019},
month = {1}
}

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Cited by: 2 works
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    Works referencing / citing this record:

    Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4
    journal, July 2019