Permeability measurements of various magnetic films by a broad band CPW technique
- Authors
- Jongryoul, K.; Inyoung, K.; Hyeon, K.K.; Masahiro, Y.
- Issue Date
- 2006
- Publisher
- IEEE
- Citation
- INTERMAG 2006 - IEEE International Magnetics Conference, pp.841 - 841
- Indexed
- SCOPUS
- Journal Title
- INTERMAG 2006 - IEEE International Magnetics Conference
- Start Page
- 841
- End Page
- 841
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/45344
- DOI
- 10.1109/INTMAG.2006.374872
- ISSN
- 2150-4598
- Abstract
- Increasing the frequency of electro-magnetic devices has been continuously pushing magnetic materials to operate over several GHz ranges.The permeability measurement of magnetic thin films were performed by both a broadband CPW and a network analyzer (0.1 -20 GHz) and Ryowa permeameter based on a single turn strip loop. The CPW was designed to have near 50Omega impedance, matching the network analyzer and cables. the permeabilities of a CoNbZr films with a film thickness of 2 mum measured by the CPW broad band method. The microstructure of a FeCoNiB thin film observed by transmission electron microscopy.The demagnetization field caused by the signal line can not be a dominant factor in the FeCoNiB film. These two results show that the broad band CPW method is a very effective way to obtain the permeability of magnetic thin films over 10 GHz but requires the careful data analysis including the microstructural characteristics and dimension of magnetic films.
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Collections - COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING > 1. Journal Articles
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