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Vector Field File Format (OVF)

Vector field files specify vector quantities (e.g., magnetization or magnetic flux density) as a function of spatial position. The OOMMF Vector Field (OVF) format is the output vector field file format used by both the 2D and 3D micromagnetic solvers. It is also the input data type read by mmDisp. There are two versions of the OVF format supported by OOMMF. The OVF 1.0 format is the preferred format and the only one written by OOMMF software. It supports both rectangular and irregular meshes, in binary and ASCII text. The OVF 0.0 format (formerly SVF) is an older, simpler format that can be useful for importing vector field data into OOMMF from other programs. (A third format, the VecFil or Vector Input/Output (VIO) format, was used by some precursors to the OOMMF code. Although OOMMF is able to read the VIO format, its use is deprecated.)

The recommended file extensions for OVF files are .omf for magnetization files, .ohf for magnetic field (H) files, .obf for magnetic flux density (B) files, or .ovf for generic files.

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OOMMF Documentation Team
October 30, 2002