Design of permanent-magnet field source for rotary-magnetic refrigeration systems

A versatile magnetic refrigeration test device

“…Recently, much work has gone into achieving the greatest cooling power when using a minimum amount of permanent magnet material while still maintaining a large field. 6,7 The majority of the proposed magnetocaloric materials have modest magnetocaloric effects at room temperature in applied fields that may reasonably be achieved in a magnetic refrigeration device. Thus, care must be taken to ensure an optimal utilization of the temperature increase and decrease offered by the materials during magnetization and demagnetization.…”

Giant entropy change at the co-occurrence of structural and magnetic transitions in the Ni $ \mathsf {_{2.19}}$ Mn $ \mathsf {_{0.81}}$ Ga Heusler alloy

“…with the application of a relatively low maximum magnetic field (1.6 T), which is attainable with a special configuration of permanent magnets [23]. Similarly to the and realised through the rapid variation of the magnetisation around the firs-order magnetic transition.…”

Design and Implementation of Portable NMR Probe Magnet

“…The permanent magnetic ring is a new permanent magnet structure (also called the Halbach array structure) suggested by J.C. Mallinson and K. Halbach, physicist of the Lawrence Berkeley National Laboratory [6,7]. As the development demand for successive miniaturization and portability of the permanent magnetic device, the outstanding feature of the permanent magnetic ring has attracted broad attention of academic and industrial circles [8][9][10][11][12]. The absolute homogeneity of the internal magnetic field of the permanent magnetic ring lies in the basis that the permanent magnet material is continuously magnetized and has no external side leakage, so it is hard to reach by current manufacturing and processing technique of the permanent material.…”