Properties of NiFe‐N films prepared by rf sputtering in nitrogen‐argon gas mixtures
作者:
K. K. Shih,
M. E. Re,
T. Takamori,
D. B. Dove,
期刊:
Journal of Applied Physics
(AIP Available online 1992)
卷期:
Volume 71,
issue 11
页码: 5539-5542
ISSN:0021-8979
年代: 1992
DOI:10.1063/1.350528
出版商: AIP
数据来源: AIP
摘要:
The structure and properties of NiFe‐N films, prepared by rf reactive sputtering process using nitrogen in the range from 0 to 40% in the nitrogen‐argon gas mixture during sputtering, have been studied. The concentration of nitrogen and the resistivity of the NiFe‐N films were determined as a function of nitrogen partial pressure. Films with good soft magnetic properties were obtained when the nitrogen in the nitrogen‐argon gas mixture during sputtering was in the range 0–10%. The resistivity of these films was low and x‐ray diffraction results indicated only an fcc structure of &ggr;‐NiFe alloy. For films deposited with more than 10% of nitrogen in the gas mixture there is a transition region where resistivity and coercivity started to increase. Films deposited with 20% nitrogen mixed with argon consist of a mixture of &ggr;‐NiFe alloy and (Ni,Fe)4N phases. With further increase of nitrogen above 30% during sputtering, a (Ni,Fe)3N phase was observed. The resistivity and coercivity of these films were high.
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