Magnetic Recording Head (TR)
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Calculates the magnetic field surrounding the recording head using a tool
for calculating the magnetic field at arbitrary points. |
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In the analysis of magnetic heads, calculation of the magnetic field distribution is required with a high spatial resolution. Since the accuracy of the finite element method depends on the element size, a fine mesh is normally necessary in order to achieve high resolution. JMAG includes a tool that uses an integral method for calculating the magnetic field at an arbitrary point as a solution to this problem. JMAG allows for precise calculation of the magnetic field at any point, independent of element division, based on the electric currents and magnetic field distribution obtained using the finite element method. Using this tool can accelerate the finite element method by reducing the need to use a fine mesh in the air region, and therefore allow fast and precise calculations for magnetic heads to be performed even when large volumes are involved. For example, consider the calculation performed on the magnetic field along a line as shown in Figure 1. |
 Figure 1 - Magnetic field calculation with JMAG Enlarged View |
| Both fine and coarse meshes were used around the tip of the magnetic head. For comparison Figure 2 shows the results obtained both from the existing method and from the combination with this tool. Note that the existing method with a coarse mesh is adversely affected by mesh quality, but the use of this tool in conjunction with a coarse mesh gives results equivalent to those obtained with a fine mesh. |  Figure 2 - Calculation sample of magnetic field for head Enlarged View |
