Hyun Soon Park, Kei Hirata, Keiichi Yanagisawa, Yoichi Ishida, Tsuyoshi Matsuda, Daisuke Shindo and Akira Tonomura Nanoscale Magnetic Characterization of Tunneling Magnetoresistance Spin Valve Head by Electron Holography Small 8
Nanostructured magnetic materials play an important role in increasing miniaturized devices. For the studies of their magnetic properties and behaviors, nanoscale imaging of magnetic field is indispensible. Here, using electron holography, the magnetization distribution of a TMR spin valve head of commercial design is investigated without and with a magnetic field applied. Characterized is the magnetic flux distribution in complex hetero-nanostructures by averaging the phase images and separating their component magnetic vectors and electric potentials.
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