Browsing by Subject "Magnetocaloric effect"

Now showing items 1-5 of 5

    • Heat flow measurements and the order of the magnetic transition in (Dy,Gd)Co-2 solid solutions 

      Sousa, V. S. R. de; Monteiro, J. C. B.; Reis, R. D. dos; Medina, A. N.; Gama, S. [UNIFESP]; von Ranke, P. J.; Gandra, F. C. G. (Elsevier B.V., 2012-02-05)
      In this work we present scanning heat flow measurements in the series of compounds Dy1-xGdxCo2 (x = 0, 0.1, 0.2, 0.3) which reveal a first order character in the magnetic transition for x = 0 and 0.1. the isothermal entropy ...

    • Investigation on the magnetocaloric effect in DyNi2, DyAl2 and Tb1-nGdnAl2 (n=0, 0.4, 0.6) compounds 

      Sousa, V. S. R. de; Plaza, E. J. R.; Reis, M. S.; Alho, B. P.; Carvalho, A. Magnus G.; Gama, S. [UNIFESP]; Oliveira, N. A. de; von Ranke, P. J. (Elsevier B.V., 2009-10-01)
      The magnetocaloric effect (MCE) in the DyNi2, DyAl2 and Tb1-nGdnAl2 (n = 0, 0.4, 0.6) was theoretically investigated in this work. the DyNi2 and DyAl2 compounds are described considering a model Hamiltonian which includes ...

    • Magnetocaloric effect in Gd(1-y)DyyAl2 

      Alho, B. P.; Ribeiro, P. O.; Alvarenga, T. S. T.; Carvalho, A. Magnus G. [UNIFESP]; Von Ranke, P. J. (Elsevier B.V., 2014-01-01)
      In this work we calculate the magnetic properties and the magnetocaloric effect in Gd-1- yDyyAl2 (y = 0, 0.25, 0.5, 0.75 and 1). the model Hamiltonian includes contributions from the Zeeman effect, the crystalline electrical ...

    • Theoretical investigation on the magnetocaloric effect in MnAs using a microscopic model to describe the magnetic and thermal hysteresis 

      Alho, B. P.; Oliveira, N. A. de; Sousa, V. S. R. de; Gama, Sergio [UNIFESP]; Coelho, A. A.; Carvalho, A. Magnus G.; von Ranke, P. J. (Elsevier B.V., 2012-06-01)
      We report the thermal and magnetic hysteresis diagram for mnAs that comes from a microscopic description of a magnetic system through a model Hamiltonian that takes into account the magnetoelastic interaction. the temperature ...

    • Utilização de regeneradores magnetocalóricos em sistema OTEC 

      Ignacio, Rene Maria [UNIFESP] (Universidade Federal de São Paulo, 2015-04-03)
      The aggravation of the energy crisis initiated at the beginning of the years 1970 and the necessity of generation of energy in a clean and sustainable way stimulate the research for technologies using renewable sources ...