Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles

Hunagund, Shivakumar G.; Harstad, Shane M.; El-Gendy, Ahmed A.; Gupta, Shalabh; Pecharsky, Vitalij K.; Hadimani, Ravi L.

doi:10.1063/1.5007686

Title: Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles

Abstract

Gadolinium silicide (Gd₅Si₄) nanoparticles (NPs) exhibit different properties compared to their parent bulk materials due to finite size, shape, and surface effects. NPs were prepared by high energy ball-milling of the as-cast Gd₅Si₄ ingot and size separated into eight fractions using time sensitive sedimentation in an applied dc magnetic field with average particle sizes ranging from 700 nm to 82 nm. The largest Gd₅Si₄ NPs order ferromagnetically at 316 K. A second anomaly observed at 110 K can be ascribed to a Gd₅Si₃ impurity. Here as the particle sizes decrease, the volume fraction of Gd₅Si₃ phase increases at the expense of the Gd₅Si₄ phase, and the ferromagnetic transition temperature of Gd₅Si₄ is reduced from 316 K to 310 K, while the ordering of the minor phase is independent of the particle size, remaining at 110 K.

Authors:

^[1]; Harstad, Shane M. ^[1]; El-Gendy, Ahmed A. ^[2]; Gupta, Shalabh ^[3]; Pecharsky, Vitalij K. ^[3]; Hadimani, Ravi L. ^[1]

Virginia Commonwealth Univ., Richmond, VA (United States)
Univ. of Texas at El Paso, El Paso, TX (United States)
Ames Lab. and Iowa State Univ., Ames, IA (United States)

Publication Date:: Thu Jan 11 00:00:00 EST 2018

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1434311

Alternate Identifier(s):: OSTI ID: 1416638

Report Number(s):: IS-J-9624
Journal ID: ISSN 2158-3226

Grant/Contract Number:: 1610967; AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: AIP Advances

Additional Journal Information:: Journal Volume: 8; Journal Issue: 5; Journal ID: ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Hunagund, Shivakumar G., Harstad, Shane M., El-Gendy, Ahmed A., Gupta, Shalabh, Pecharsky, Vitalij K., and Hadimani, Ravi L. Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5007686.

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                    Hunagund, Shivakumar G., Harstad, Shane M., El-Gendy, Ahmed A., Gupta, Shalabh, Pecharsky, Vitalij K., & Hadimani, Ravi L. Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles.  United States.  https://doi.org/10.1063/1.5007686

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                    Hunagund, Shivakumar G., Harstad, Shane M., El-Gendy, Ahmed A., Gupta, Shalabh, Pecharsky, Vitalij K., and Hadimani, Ravi L. Thu .  
"Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles".  United States.  https://doi.org/10.1063/1.5007686.  https://www.osti.gov/servlets/purl/1434311.

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@article{osti_1434311,

  title        = {Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles},

  author       = {Hunagund, Shivakumar G. and Harstad, Shane M. and El-Gendy, Ahmed A. and Gupta, Shalabh and Pecharsky, Vitalij K. and Hadimani, Ravi L.},

  abstractNote = {Gadolinium silicide (Gd5Si4) nanoparticles (NPs) exhibit different properties compared to their parent bulk materials due to finite size, shape, and surface effects. NPs were prepared by high energy ball-milling of the as-cast Gd5Si4 ingot and size separated into eight fractions using time sensitive sedimentation in an applied dc magnetic field with average particle sizes ranging from 700 nm to 82 nm. The largest Gd5Si4 NPs order ferromagnetically at 316 K. A second anomaly observed at 110 K can be ascribed to a Gd5Si3 impurity. Here as the particle sizes decrease, the volume fraction of Gd5Si3 phase increases at the expense of the Gd5Si4 phase, and the ferromagnetic transition temperature of Gd5Si4 is reduced from 316 K to 310 K, while the ordering of the minor phase is independent of the particle size, remaining at 110 K.},

  doi          = {10.1063/1.5007686},

  journal      = {AIP Advances},

  number       = 5,

  volume       = 8,

  place        = {United States},

  year         = {Thu Jan 11 00:00:00 EST 2018},

  month        = {Thu Jan 11 00:00:00 EST 2018}

}

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Works referenced in this record:

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Works referencing / citing this record:

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

Harstad, S. M.; El-Gendy, A. A.; Gupta, S.
JOM, Vol. 71, Issue 9
DOI: 10.1007/s11837-019-03626-1

Differential effect of magnetic alignment on additive manufacturing of magnetocaloric particles
journal, January 2020

Al-Milaji, Karam N.; Gupta, Shalabh; Pecharsky, Vitalij K.
AIP Advances, Vol. 10, Issue 1
DOI: 10.1063/1.5130028

Gadolinium silicide (Gd ₅ Si ₄ ) nanoparticles for tuneable broad band microwave absorption
journal, February 2019

Bora, Pritom J.; Harstad, S. M.; Gupta, S.
Materials Research Express, Vol. 6, Issue 5
DOI: 10.1088/2053-1591/aafd55

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Title: Investigating phase transition temperatures of size separated gadolinium silicide magnetic nanoparticles

Abstract

Citation Formats

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