TY - JOUR

T1 - Demagnetizing effects in stacked rectangular prisms

A1 - Christensen,Dennis

A1 - Nielsen,Kaspar Kirstein

A1 - Bahl,Christian Robert Haffenden

A1 - Smith,Anders

AU - Christensen,Dennis

AU - Nielsen,Kaspar Kirstein

AU - Bahl,Christian Robert Haffenden

AU - Smith,Anders

PB - Institute of Physics Publishing

PY - 2011

Y1 - 2011

N2 - A numerical, magnetostatic model of the internal magnetic field of a rectangular prism is extended to the case of a stack of rectangular prisms. The model enables the calculation of the spatially resolved, three-dimensional internal field in such a stack given any magnetic state function, stack configuration, temperature distribution and applied magnetic field. In this paper the model is applied to the case of a stack of parallel, ferromagnetic rectangular prisms and the resulting internal field is found as a function of the orientation of the applied field, the number of prisms in the stack, the spacing between the prisms and the packing density of the stack. The results show that the resulting internal field is far from being equal to the applied field and that the various stack configurations investigated affect the resulting internal field significantly and non-linearly. The results have a direct impact on the design of, e.g., active magnetic regenerators made of stacked rectangular prisms in terms of optimizing the internal field.

AB - A numerical, magnetostatic model of the internal magnetic field of a rectangular prism is extended to the case of a stack of rectangular prisms. The model enables the calculation of the spatially resolved, three-dimensional internal field in such a stack given any magnetic state function, stack configuration, temperature distribution and applied magnetic field. In this paper the model is applied to the case of a stack of parallel, ferromagnetic rectangular prisms and the resulting internal field is found as a function of the orientation of the applied field, the number of prisms in the stack, the spacing between the prisms and the packing density of the stack. The results show that the resulting internal field is far from being equal to the applied field and that the various stack configurations investigated affect the resulting internal field significantly and non-linearly. The results have a direct impact on the design of, e.g., active magnetic regenerators made of stacked rectangular prisms in terms of optimizing the internal field.

KW - Magnetic refrigeration

KW - Magnetisk køling

U2 - 10.1088/0022-3727/44/21/215004

DO - 10.1088/0022-3727/44/21/215004

JO - Journal of Physics D: Applied Physics

JF - Journal of Physics D: Applied Physics

SN - 0022-3727

IS - 21

VL - 44

SP - 215004

ER -