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MFM and PEEM observation of micrometre-sized magnetic dot arrays fabricated by ion-microbeam irradiation in FeRh thin films

Aiko, Kazuma*; Toki, Atsushi*; Matsui, Toshiyuki*; Iwase, Akihiro*; Sato, Takahiro; Takano, Katsuyoshi*; Koka, Masashi; Saito, Yuichi; Kamiya, Tomihiro; Okochi, Takuo*; Kotsugi, Masato*; Nakamura, Tetsuya*; Kinoshita, Toyohiko*

FeRh thin films were irradiated with 10 MeV iodine ion microbeam to produce the lateral magnetic modification in micron-meter scale. Two-dimensional magnetic dot arrays with the dimension of approximately 2$$times$$4 $$mu$$m$$^2$$ as well as 10$$times$$10 $$mu$$m$$^2$$ were successfully produced on the FeRh surface, which was observed by magnetic force microscopy. The results of the photoelectron emission microscopy combined with X-ray magnetic circular dichroism reveal that the easy axis of the magnetization of the ion beam irradiated ferromagnetism in the FeRh thin films lies in the film planes along the $$<$$001$$>$$ direction of the MgO substrates.

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