3:30 PM - 3:45 PM [10p-Z06-12] High resolution Detection of Zigzag Magnetic Reversal Boundary of Perpendicular Magnetic Recording Media Film by Alternating Magnetic Force Microscopy 〇(M1)Hanamichi Tanaka1, Shu Wada1, Toru Matsumura1, Hitoshi Saito1 (1.Akita Univ.)