TY - JOUR
T1 - High frequency characteristics of nanocrystalline Co-Fe-Hf-O Soft magnetic films
AU - Hayakawa, Y.
AU - Ohminato, K.
AU - Hasegawa, N.
AU - Makino, A.
PY - 1997/3
Y1 - 1997/3
N2 - 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 (μ′) 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 (ρ) of 13 μ Ω and large anisotropy field (Hk) of 4.8 kA/m.
AB - 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 (μ′) 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 (ρ) of 13 μ Ω and large anisotropy field (Hk) of 4.8 kA/m.
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U2 - 10.1051/jp4:19971202
DO - 10.1051/jp4:19971202
M3 - Article
AN - SCOPUS:0003167759
SN - 1951-6355
VL - 7
SP - C1-495-C1-496
JO - European Physical Journal: Special Topics
JF - European Physical Journal: Special Topics
IS - 1
ER -