| Numéro |
J. Phys. IV France
Volume 07, Numéro C1, Mars 1997
7th INTERNATIONAL CONFERENCE ON FERRITES
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|---|---|---|
| Page(s) | C1-495 - C1-496 | |
| DOI | https://doi.org/10.1051/jp4:19971202 | |
7th INTERNATIONAL CONFERENCE ON FERRITES
J. Phys. IV France 07 (1997) C1-495-C1-496
DOI: 10.1051/jp4:19971202
Nagaoka Branch, Central Research Laboratory, Alps Electric Co., Ltd., 1-3-5 Higashi-Takami, Nagaoka 940, Japan
© EDP Sciences 1997
J. Phys. IV France 07 (1997) C1-495-C1-496
DOI: 10.1051/jp4:19971202
High Frequency Characteristics of Nanocrystalline Co-Fe-Hf-O Soft Magnetic Films
Y. Hayakawa, K. Ohminato, N. Hasegawa and A. MakinoNagaoka Branch, Central Research Laboratory, Alps Electric Co., Ltd., 1-3-5 Higashi-Takami, Nagaoka 940, Japan
Abstract
The microstructure, electrical resistivity, and high frequency soft magnetic properties of nanocrystalline Co-Fe-Hf-O films were investigated. The films were prepared by rf reactive sputtering technique in Ar + O2 mixed atmosphere under a static magnetic field or no field. In an as-deposited state, a Co44.3Fe19.1Hf14.5O22.1 film deposited in a static field consists of mixed structure of amorphous phase and bcc nanocrystals with 3 - 4 nm in diameter. The real part (ν) of complex permeability of 160 is almost constant up to 1GHz, and extremely high µ'/µ" of 61 at 100 MHz is obtained. These high frequency characteristics are caused by the high electrical resistivity (μ) of 13 µΩm and large anisotropy field (Hk) of 4.8 kA/m.
© EDP Sciences 1997