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        Mechanical stability of ferrimagnetic CoFe2O4 flexible thin films

        오광림,곽영민,공다솔,류상균,Kim Hyuntae,Jeen Hyoungjeen,최수봉,정종훈 한국물리학회 2021 Current Applied Physics Vol.31 No.-

        We fabricated high-quality ferrimagnetic CoFe2O4 (CFO) thin films on a mica substrate using a pulsed laser deposition technique. High-resolution X-ray diffraction and transmission electron microscopy revealed that the film grew epitaxially with the relationships of CFO <1-10> || Mica [010] and CFO [111] || Mica [001]. The films were highly flexible in terms of both inward and outward bending, and exhibited clear ferrimagnetic hysteresis with weak anisotropy in both the in-plane and out-of-plane directions. We observed that the magnetization of CFO films was robust against mechanical stimuli without microcracks. The remnant magnetization and coercive field were within 8% and 11% over a strain of ±0.54%. As the number of bending cycles increased, the magnetic easy axis became more closely aligned to the out-of-plane direction, without any noticeable change in domain size.

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