Abstract
Magnetization distribution in a magnetic grating recording process is newly analyzed. The grating is assumed to be generated in magneto-optical (MO) media by irradiating pulsed interference fringes. The magnetization distributions are determined by the force balance equation, that is, domain wall pressure is equals to frictional force. The analysis considers the total magnetic energy which is the sum of magneto-static, Zeeman, and wall energies. The calculated domain width of magnetic grating is different from result of the conventional analysis. The difference increases as thermal modulation depth decreases. The analysis also shows that the maximum diffraction efficiency can be obtained for a wide range of the thermal modulation depths at optimum light intensity. These theoretical results agree well with observed recorded domains and measured diffraction efficiencies.
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