Digital information is stored in an unpatterned magnetic film, using the inherent, natural properties of the domain walls in ferromagnetic materials to write data on an unpatterned magnetic film.

通过用铁磁性材料中畴壁固有的自然特性在未构图的磁膜上写入数据，在未构图的磁膜中存储数字信息。

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Considering atomic anharmonic vibration, the authors have figured out the expression of free energy and relaxation of single-domain ferromagnetic granule in magnetic field.

结果表明：原子的非简谐振动会影响单畴铁磁粒子的自由能，但是不会影响弛豫时间。

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According to relative theories of ferromagnetics, the internal magnetic properties of ferromagnetic in the magnetic domain model are studied in this thesis;

根据铁磁学的相关理论，研究了磁畴模型下铁磁体的内部磁特性；

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