Perpendicular Magnetic Anisotropy in Flexible Barium Hexaferrite/muscovite Heterostructure

Wei-En Ke^1*, Chang-Yang Kuo^2,3, Ying-Hao Chu¹

¹Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, Taiwan
²National Synchrotron Radiation Research Center, National Synchrotron Radiation Research Center, Hsinchu, Taiwan
³Max-Plank-Institut für Chemische Physik fester Stoffe, Max-Plank-Institut für Chemische Physik fester Stoffe, Dresden, Germany

* Presenter:Wei-En Ke, email:kowayne2007@gmail.com

As the development of magnetic storage devices becomes more important, perpendicular magnetic anisotropy (PMA) materials have attracted numerous attention increasingly. Meanwhile, applications of functional flexible devices are of great importance nowadays. Therefore, a flexible storage system with PMA property will be in a high demand in the future. Barium hexaferrite (BaFe12O19, BaM) is a promising PMA material on this flexible system due to its moderately large magnetocrystalline anisotropy, high Curie temperature, as well as excellent chemical stability and corrosion resistance. As for flexible substrate, muscovite mica is selected due to high flexibility within few microns in thickness, high thermal and chemical stability. In this study, we fabricate BaFe12O19(BaM)/muscovite heterostructure with PMA property via pulsed laser deposition. The particular PMA property was precisely analyzed by vibrating sample magnetometer (VSM), magnetic force microscopy (MFM), and x-ray absorption spectroscopy (XAS). Furthermore, a series of bending tests was carried out, showing robust PMA property against severe mechanical bending. These results demonstrate that BaM/muscovite heterostructure with PMA property has potential application in flexible magnetic storage devices and actuator.

Keywords: Perpendicular magnetic anisotropy, Muscovite mica, Flexible magnetic storage devices, Actuator