Investigation of room temperature ferromagnetic nanoparticles of Gd5Si4

Hadimani, R. L.; Gupta, S.; Harstad, S. M.; Pecharsky, V. K.; Jiles, D. C.

doi:10.1109/TMAG.2015.2446774

Title: Investigation of room temperature ferromagnetic nanoparticles of Gd₅Si₄

Abstract

Gd₅(Si_xGe_1-x)₄ compounds undergo first-order phase transitions close to room temperature when x ~ = 0.5, which are accompanied by extreme changes of properties. We report the fabrication of the nanoparticles of one of the parent compounds-Gd₅Si₄-using high-energy ball milling. Crystal structure, microstructure, and magnetic properties have been investigated. Particles agglomerate at long milling times, and the particles that are milled >20 min lose crystallinity and no longer undergo magnetic phase transition close to 340 K, which is present in a bulk material. The samples milled for >20 min exhibit a slightly increased coercivity. As a result, magnetization at a high temperature of 275K decreases with the increase in the milling time.

Authors:

Hadimani, R. L. ^[1]; Gupta, S. ^[2]; Harstad, S. M. ^[3]; Pecharsky, V. K. ^[1]; Jiles, D. C. ^[3]

Iowa State Univ., Ames, IA (United States); Ames Lab., Ames, IA (United States)
Ames Lab., Ames, IA (United States)
Iowa State Univ., Ames, IA (United States)

Publication Date:: Mon Jul 06 00:00:00 EDT 2015

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

Sponsoring Org.:: USDOE

OSTI Identifier:: 1227400

Report Number(s):: IS-J-8668
Journal ID: ISSN 0018-9464; PII: S0368204814001571

Grant/Contract Number:: CSR-KN/CRS-22; AC02-07CH11358

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Magnetics

Additional Journal Information:: Journal Volume: 51; Journal Issue: 11; Journal ID: ISSN 0018-9464

Publisher:: Institute of Electrical and Electronics Engineers. Magnetics Group

Country of Publication:: United States

Language:: English

Subject:: 77 NANOSCIENCE AND NANOTECHNOLOGY; contrast agents; gadolinium nanoparticles; magnetocaloric nanoparticles; room temperature ferromagnetic nanoparticles

Citation Formats


                    Hadimani, R. L., Gupta, S., Harstad, S. M., Pecharsky, V. K., and Jiles, D. C. Investigation of room temperature ferromagnetic nanoparticles of Gd5Si4.  United States: N. p., 2015. 
Web.  doi:10.1109/TMAG.2015.2446774.

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                    Hadimani, R. L., Gupta, S., Harstad, S. M., Pecharsky, V. K., & Jiles, D. C. Investigation of room temperature ferromagnetic nanoparticles of Gd5Si4.  United States.  https://doi.org/10.1109/TMAG.2015.2446774

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                    Hadimani, R. L., Gupta, S., Harstad, S. M., Pecharsky, V. K., and Jiles, D. C. Mon .  
"Investigation of room temperature ferromagnetic nanoparticles of Gd5Si4".  United States.  https://doi.org/10.1109/TMAG.2015.2446774.  https://www.osti.gov/servlets/purl/1227400.

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@article{osti_1227400,

  title        = {Investigation of room temperature ferromagnetic nanoparticles of Gd5Si4},

  author       = {Hadimani, R. L. and Gupta, S. and Harstad, S. M. and Pecharsky, V. K. and Jiles, D. C.},

  abstractNote = {Gd5(SixGe1-x)4 compounds undergo first-order phase transitions close to room temperature when x ~ = 0.5, which are accompanied by extreme changes of properties. We report the fabrication of the nanoparticles of one of the parent compounds-Gd5Si4-using high-energy ball milling. Crystal structure, microstructure, and magnetic properties have been investigated. Particles agglomerate at long milling times, and the particles that are milled >20 min lose crystallinity and no longer undergo magnetic phase transition close to 340 K, which is present in a bulk material. The samples milled for >20 min exhibit a slightly increased coercivity. As a result, magnetization at a high temperature of 275K decreases with the increase in the milling time.},

  doi          = {10.1109/TMAG.2015.2446774},

  journal      = {IEEE Transactions on Magnetics},

  number       = 11,

  volume       = 51,

  place        = {United States},

  year         = {Mon Jul 06 00:00:00 EDT 2015},

  month        = {Mon Jul 06 00:00:00 EDT 2015}

}

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Works referencing / citing this record:

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Title: Investigation of room temperature ferromagnetic nanoparticles of Gd5Si4

Abstract

Citation Formats

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