Magnetic Recording Head (TR):
Transient Magnetic Field Analysis

	Trial Version
	Video Tutorials

Transient Response Analysis of Head Magnetic Field JMAG is being used for developing magnetic recording heads.The data storage density obtainable using magnetic recording continues to increase at an incredible rate. Modeling technology to accurately represent the three-dimensional shapes of components such as yokes and coils is essential for analyzing magnetic heads. In order to evaluate response properties, eddy current analysis is also imperative. JMAG includes an automatic mesh generator that enables complex three-dimensional geometry, such as magnetic heads to be meshed taking into account the thin skin depth, and allows for efficient and precise analysis. Automatic meshing allows for easy modification of the geometry or shape (See Figure 2).

Magnetic Head Canonical problem of SRC* simulation working group (*Storage Research Consortium Simulation of Japan)

Figure 2 - Automatically generated mesh
Enlarged View	Enlarged View	Enlarged View

Variations of head magnetic field with time JMAG uses FEM edge element for the analysis, and so provides fast and consistent solutions even with a large number of elements. Figure 3 shows the variations of the head magnetic field against time, obtained from a JMAG calculation.	Figure 3 - History of magnetic flux density Enlarged View
The figure on the left shows the time-variation animation. The actual variations can be viewed on the screen. For a more detailed view, see the full animation file (120 kB).