Stock material or miscellaneous articles – Composite – Of inorganic material
Patent
1997-11-06
1999-11-02
Kiliman, Leszek
Stock material or miscellaneous articles
Composite
Of inorganic material
428694TS, 428694TM, 428900, 148306, 148310, 148311, 148312, 148313, 148315, 148317, 148318, 148121, 420128, 420125, 420435, 420440, 420441, 420442, 420452, 420459, G11B 566
Patent
active
059767154
ABSTRACT:
The invention is embodied in a soft magnetic thin film article comprising an iron--chromium-nitrogen (Fe--Cr--N) based alloy and methods for making such article. The soft magnetic thin film article is formed using an iron--chromium--nitrogen based alloy with tantalum in one embodiment and with at least one of the elements titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), molybdenum (Mo), niobium (Nb) or tungsten (W) in another embodiment. The article is formed such that the alloy has a relatively high saturation magnetization (e.g., greater than approximately 15 kG) and a relatively low coercivity (e.g., less than approximately 2.0 oersteds) in an as-deposited condition or, alternatively, with a very low temperature treatment (e.g., below approximately 150.degree. C.). The inventive films are suitable for use in electromagnetic devices, for example, in microtransformer cores, inductor cores and in magnetic read-write heads.
REFERENCES:
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patent: 5382305 (1995-01-01), Terunuma
patent: 5421915 (1995-06-01), Nakanishi
Noriyuki Kataoka, Masami Hosokawa, Akihisa Inoue, and Tsuyoshi Masumoto, "Magnetic Properties of Fe-Based Binary Crystalline Alloys Produced by Vapor Quenching", Japanese Journal of Applied Physics, vol. 28, No. 3, Mar. 1989, pp. L462-L464.
Kiyohito Yamasawa, Member, IEEE, Kenji Maruyama, Isao Hirohama, and Paul P. Biringer, Fellow, IEEE, "High-Frequency Operation of a Planar-Type Microtransformer and Its Application to Multilayered Switching Regulators" IEEE Transactions on Magnetics, vol. 26, No. 3, May 1990, pp. 1204-1209.
G. Qiu, E. Haftek and J. A. Barnard, "Magnetic Properties and Crystal Structure of High Moment FeTaN Materials For Thin-Film Recording Heads", J. Appl. Phys. 73(10), May 15, 1993, pp. 6573-6575.
Nobuyuki Ishiwata, Chizuko Wakabayashi, and Haruo Urai, "Soft Magnetism of High-Nitrogen-Concentration FeTaN Films", J. Appl. Phy. 69 (8), Apr. 15, 1991, pp. 5616-5618.
Chen Li-Han
Jin Sung-ho
van Dover Robert Bruce
Zhu Wei
Harman John J.
Kiliman Leszek
Lucent Techologies Inc.
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