Applied Physics A

, 124:269 | Cite as

Unusual effects of manual grinding and subsequent annealing process observed in Gd5.09Ge2.03Si1.88 compound

  • A. M. G. Carvalho
  • C. S. Alves
  • P. V. Trevizoli
  • A. O. dos Santos
  • S. Gama
  • A. A. Coelho


The Gd5.09Ge2.03Si1.88 compound, as well as other magnetocaloric materials, certainly will not be used in their un-manufactured as-cast condition in future magnetic refrigeration applications or other devices. In this work, we have studied the Gd5.09Ge2.03Si1.88 compound processed in different ways, mainly, the as-cast powder, the annealed powder, and the pressed and sintered powder. The annealed powder (1370 K/20 h) does not present the monoclinic phase and the first-order magneto-structural transition observed in the as-cast powder. The pressed and sintered powder also do not present the first-order transition. Furthermore, the compacting pressure shifts the second-order magnetic transition to lower temperatures. The behavior of cell parameters as a function of the compacting pressure indicates that TC is directly affected by parameter c change.



The authors thank financial support from Fundação de Amparo à Pesquisa do Estado de São Paulo—FAPESP and Conselho Nacional de Desenvolvimento Científico e Tecnológico—CNPq.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Laboratório Nacional de Luz Síncrotron (LNLS)Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)CampinasBrazil
  2. 2.Departamento de Engenharia MecânicaUEMMaringáBrazil
  3. 3.Centro de Ciências Sociais, Saúde e TecnologiaUFMAImperatrizBrazil
  4. 4.Departamento de Ciências Exatas e da TerraUNIFESPDiademaBrazil
  5. 5.Instituto de Física Gleb WataghinUNICAMPCampinasBrazil

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