Bulk and high-energy ball-milled Gd5Si2Ge2: Comparative study of magnetic and magnetocaloric properties
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
01/01/2011
|
| Resumo |
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. |
| Formato |
209-215 |
| Identificador |
http://dx.doi.org/10.1016/j.solidstatesciences.2010.11.016 Solid State Sciences. Amsterdam: Elsevier B.V., v. 13, n. 1, p. 209-215, 2011. 1293-2558 http://hdl.handle.net/11449/41905 10.1016/j.solidstatesciences.2010.11.016 WOS:000287286000035 |
| Idioma(s) |
eng |
| Publicador |
Elsevier B.V. |
| Relação |
Solid State Sciences |
| Direitos |
closedAccess |
| Palavras-Chave | #Magnetic properties #Magnetocaloric properties #Ball milling #Structural transition |
| Tipo |
info:eu-repo/semantics/article |
