The magnetic field generated by a magnetic recording head is evaluated using electron holography. A magnetic recording head, which is connected to an electric current source, is set on the specimen holder of a transmission electron microscope. Reconstructed phase images of the region around the magnetic pole show the change in the magnetic field distribution corresponding to the electric current applied to the coil of the head. A simulation of the magnetic field, which is conducted using the finite element method, reveals good agreement with the experimental observations.
Bibliographical noteFunding Information:
This work was performed under the Cooperative Research Program of “Network Joint Research Center for Materials and Devices”, and partly supported by a Grant-in-Aid for Young Scientists (B 22760528) from the Japan Society for the Promotion of Science.
Copyright 2014 Elsevier B.V., All rights reserved.
- electron holography
- finite element method
- in situ observation
- magnetic field
- magnetic recording head
- transmission electron microscopy