Transmission electron microscopy on thin film of high density magnetic composite prepared by FIB method.
A thin specimen of a high density magnetic composite (HDMC), which is a type of powder magnetic cores was prepared for transmission electron microscopy (TEM) using a focused ion beam (FIB) method. A homogeneous thin film containing an insulator boundary between the constituent Fe powders was obtained successfully. Using this thin film, detailed flow of magnetic flux was visualized by electron holography, and the magnetic flux density was estimated to be 1.73 +/- 0.09 T being consistent with that of a bulk HDMC (1.70 T). Moreover, through Lorentz microscopy, the characteristic magnetization process of HDMC was observed by applying the magnetic field up to approximately 8 kA/m.
Kobayashi
Yuko
Y
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Aobaku, Sendai 980-8577, Japan. kobayu@mail.tagen.tohoku.ac.jp
Park
Young-Gil
YG
Shindo
Daisuke
D
Tajima
Shin
S
D006696:Holography; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D013048:Specimen Handling / Q000379:methods*