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Investigation of Room Temperature Ferromagnetic Nanoparticles of Gd5Si4
IEEE Transactions on Magnetics
  • Ravi L. Hadimani, Iowa State University
  • S. Gupta, Ames Laboratory
  • S. M. Harstad, Iowa State University
  • Vitalij K. Pecharsky, Iowa State University and Ames Lab
  • David C. Jiles, Iowa State University
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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. Magnetization at a high temperature of 275 K decreases with the increase in the milling time.

This is a manuscript of an article published as Hadimani, R. L., S. Gupta, S. M. Harstad, V. K. Pecharsky, and D. C. Jiles. "Investigation of Room Temperature Ferromagnetic Nanoparticles of Gd 5 Si 4." IEEE Transactions on Magnetics 51, no. 11 (2015): 1-4. DOI: 10.1109/TMAG.2015.2446774. Posted with permission.

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Ravi L. Hadimani, S. Gupta, S. M. Harstad, Vitalij K. Pecharsky, et al.. "Investigation of Room Temperature Ferromagnetic Nanoparticles of Gd5Si4" IEEE Transactions on Magnetics Vol. 51 Iss. 11 (2015) p. 2504104
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