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http://acervodigital.unesp.br/handle/11449/41905- Título:
- Bulk and high-energy ball-milled Gd5Si2Ge2: Comparative study of magnetic and magnetocaloric properties
- McMaster Univ
- Universidade Estadual Paulista (UNESP)
- 1293-2558
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- MRI, Ontario
- High-energy ball milling was employed to produce small particles of Gd5Si2Ge2. Magnetic and magnetocaloric properties of the ball-milled and bulk Gd5Si2Ge2 samples were investigated through the magnetization measurements. When compared to the bulk material, a significant decrease in saturation magnetization and magnetocaloric effect (-Delta S-max = 4 vs. 20 J/kgK for Delta H = 0-5 T) is observed even after the relatively short ball milling time of 4 h which produced particles with an average size of ca. 0.5 mu m. The ball-milled samples appear to loose a first-order structural transition, present in bulk Gd5Si2Ge2, and display a superparamagnetic behaviour below the corresponding Curie temperatures. (C) 2010 Elsevier Masson SAS. All rights reserved.
- 1-Jan-2011
- Solid State Sciences. Amsterdam: Elsevier B.V., v. 13, n. 1, p. 209-215, 2011.
- 209-215
- Elsevier B.V.
- Magnetic properties
- Magnetocaloric properties
- Ball milling
- Structural transition
- http://dx.doi.org/10.1016/j.solidstatesciences.2010.11.016
- Acesso restrito
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- http://repositorio.unesp.br/handle/11449/41905
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