Measuring the effect of demagnetization in stacks of gadolinium plates using the magnetocaloric effect

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:323

Article

Lipso, K. W.²  Nielsen, K. K.^1,3  Christensen, D. V.^1,4  Bahl, C. R. H.¹  Engelbrecht, K.¹  Kuhn, L. Theil¹  Smith, A.¹ 

[1] Tech Univ Denmark, Riso Natl Lab Sustainable Energy, Fuel Cells & Solid State Chem Div, DK-4000 Roskilde, Denmark

[2] Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark

[3] Tech Univ Denmark, Dept Mech Engn, DK-2800 Lyngby, Denmark

[4] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

关键词: Demagnetizing field;    Gadolinium;    Adiabatic temperature change;    Numerical model;   

DOI  :  10.1016/j.jmmm.2011.06.052

来源: Elsevier

【 摘 要 】

The effect of demagnetization in a stack of gadolinium plates is determined experimentally by using spatially resolved measurements of the adiabatic temperature change due to the magnetocaloric effect. The number of plates in the stack, the spacing between them and the position of the plate on which the temperature is measured are varied. The orientation of the magnetic field is also varied. The measurements are compared to a magnetostatic model previously described. The results show that the magnetocaloric effect, due to the change in the internal field, is sensitive to the stack configuration and the orientation of the applied field. This may have significant implications for the construction of a magnetic cooling device. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

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