Demonstration of substantial improvements in recording process with MAMR.

• The correlation analysis method is proposed to verify the MAS effect in the recording process. • It is confirmed that the medium-dependent gain corresponds to the FMR frequency change between the media. • This is the world's first report on the quantification of the MAS effect in the recording process. Frequency matching is the most important key point for designing microwave-assisted switching (MAS) and microwave-assisted magnetic recording (MAMR). It is necessary to quantitatively compare an assist effect by MAS (MAS effect) of some media when designing and optimizing a medium from the viewpoint of frequency matching experimentally. However, it is difficult to directly compare the MAS effect between media because the differences in the resolution and saturation characteristics of the medium strongly influence the recording properties. In this study, we propose a new method for appropriately removing these effects other than the MAS effect by evaluating the relationship of recording characteristics between media. By using this method, the difference of the MAS effect between any media can be quantitatively compared and used as an index for medium design to optimize MAMR. [ABSTRACT FROM AUTHOR]