Development of High-Field Permanent Magnetic Circuits for NMRI/MRI and Imaging on Mice

Figure 4

The boundary schematic of selected 1/4 permanent magnet in computation. is the boundary parallel to magnetic induction lines. denotes the symmetrical boundary perpendicular to magnetic induction lines. denotes the border between two materials such as iron and NdFeB, air and NdFeB, magnetic poles alloy and NdFeB, and magnetic poles alloy and air. is the boundary of magnetizing current.