Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4

doi:10.1007/s11837-019-03626-1

Title: Magnetocaloric Effect of Micro- and Nanoparticles of Gd₅Si₄

Abstract

We report that materials exhibiting a large magnetocaloric effect (MCE) at or near room temperature are critical for solid-state refrigeration applications. The MCE is described by a change in entropy (ΔS_M) and/or temperature (ΔT_ad) of a material in response to a change in applied magnetic field. Ball milled materials generally exhibit smaller ΔS_M values compared to bulk; however, milling broadens the effect, potentially increasing the relative cooling power (RCP). The as-cast Gd₅Si₄ is an attractive option due to its magnetic transition at 340 K and associated MCE. Investigation of effect of particles size and transition temperature in the binary material, Gd₅Si₄, can lead to development of functionally graded bulk material with higher MCE and RCP than the traditional bulk materials. A two-step ball-milling process, in which coarse powder of Gd₅Si₄ was first milled with poly(ethylene glycol) followed by milling in heptane was used to produce fine particles of Gd₅Si₄ that showed a broad distribution in particle size. Magnetic measurement on the milled sample obtained after washing with water show a decrease in Curie temperature and significant broadening of the magnetic transition. Compared to bulk Gd₅Si₄, the maximum MCE of the milled samples is also reduced and shifted down by closemore »« less

Authors:

Harstad, S. M. ^[1]; El-Gendy, A. A. ^[2]; Gupta, S. ^[3]; Pecharsky, V. K. ^[4];

^[1]

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

Publication Date:: 2019-07-02

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:: 1556924

Report Number(s):: IS-J-9989
Journal ID: ISSN 1047-4838

Grant/Contract Number:: AC02-07CH11358; 1726617; 1357565

Resource Type:: Accepted Manuscript

Journal Name:: JOM. Journal of the Minerals, Metals & Materials Society

Additional Journal Information:: Journal Volume: 71; Journal Issue: 9; Journal ID: ISSN 1047-4838

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    Harstad, S. M., El-Gendy, A. A., Gupta, S., Pecharsky, V. K., and Hadimani, R. L. Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4.  United States: N. p., 2019. 
        Web.  doi:10.1007/s11837-019-03626-1.

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                    Harstad, S. M., El-Gendy, A. A., Gupta, S., Pecharsky, V. K., & Hadimani, R. L. Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4.  United States.  doi:10.1007/s11837-019-03626-1.

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                    Harstad, S. M., El-Gendy, A. A., Gupta, S., Pecharsky, V. K., and Hadimani, R. L. Tue .  
        "Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4".  United States.  doi:10.1007/s11837-019-03626-1.  https://www.osti.gov/servlets/purl/1556924.

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@article{osti_1556924,

  title        = {Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4},

  author       = {Harstad, S. M. and El-Gendy, A. A. and Gupta, S. and Pecharsky, V. K. and Hadimani, R. L.},

  abstractNote = {We report that materials exhibiting a large magnetocaloric effect (MCE) at or near room temperature are critical for solid-state refrigeration applications. The MCE is described by a change in entropy (ΔSM) and/or temperature (ΔTad) of a material in response to a change in applied magnetic field. Ball milled materials generally exhibit smaller ΔSM values compared to bulk; however, milling broadens the effect, potentially increasing the relative cooling power (RCP). The as-cast Gd5Si4 is an attractive option due to its magnetic transition at 340 K and associated MCE. Investigation of effect of particles size and transition temperature in the binary material, Gd5Si4, can lead to development of functionally graded bulk material with higher MCE and RCP than the traditional bulk materials. A two-step ball-milling process, in which coarse powder of Gd5Si4 was first milled with poly(ethylene glycol) followed by milling in heptane was used to produce fine particles of Gd5Si4 that showed a broad distribution in particle size. Magnetic measurement on the milled sample obtained after washing with water show a decrease in Curie temperature and significant broadening of the magnetic transition. Compared to bulk Gd5Si4, the maximum MCE of the milled samples is also reduced and shifted down by close to 30 K, but the MCE remains substantial over a broader temperature range. Lastly, the RCP of both milled samples increased 75% from the bulk material.},

  doi          = {10.1007/s11837-019-03626-1},

  journal      = {JOM. Journal of the Minerals, Metals & Materials Society},

  number       = 9,

  volume       = 71,

  place        = {United States},

  year         = {2019},

  month        = {7}

}

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DOI: 10.1007/s11837-019-03626-1

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Works referencing / citing this record:

Influence of A-Site cation size-disorder on the magnetocaloric response of La _0.6 Ca _x Sr _0.4-x MnO ₃ nanoparticles
journal, January 2020

Hunt, C. S. M.; Barua, R.; Carpenter, E. E.
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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
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Title: Magnetocaloric Effect of Micro- and Nanoparticles of Gd5Si4

Abstract

Citation Formats

Investigation of Room Temperature Ferromagnetic Nanoparticles of Gd 5 Si 4 journal, November 2015

Evaluation of silicon nitride as a diffusion barrier for Gd–Si–Ge films on silicon journal, November 2005

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Determination of Curie temperature by Arrott plot technique in Gd5(SixGe1−x)4 for x>0.575 journal, October 2008

Resistivity recovery in Gd5Si2.09Ge1.91 by annealing journal, May 2010

Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from ∼20 to ∼290 K journal, June 1997

Powder metallurgy influences on the magnetic properties of Gd5.09Ge2.03Si1.88 alloy journal, April 2008

Field and temperature induced colossal strain in Gd5(SixGe1−x)4 journal, March 2011

Field induced structural phase transition at temperatures above the Curie point in Gd5(SixGe1−x)4 journal, April 2009

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Title: Magnetocaloric Effect of Micro- and Nanoparticles of Gd₅Si₄

Investigation of Room Temperature Ferromagnetic Nanoparticles of Gd ₅ Si ₄
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Evaluation of silicon nitride as a diffusion barrier for Gd–Si–Ge films on silicon
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Magnetocaloric properties and critical behavior of high relative cooling power FeNiB nanoparticles
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Field induced structural phase transition at temperatures above the Curie point in Gd5(SixGe1−x)4
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