Magnetic Films Tremag Co–Ni–Fe

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Abstract

Magnetic films for creating magnetic field amplifiers must have a high magnetic permeability. The magnetization characteristics of electrochemically deposited Co–Ni–Fe films of variable composition are investigated using a magnetic force microscope at the nanometer scale. The difference in the magnetization of the samples is explained from the standpoint of the peculiarities of the local domain and crystallographic structure. We suppose that high magnetic permeability in weak magnetic fields is determined by the crystal lattice of the tremag Co60Ni20Fe20, in which the cells fcc and bcc are adjacent to each other.

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About the authors

R. D. Tikhonov

Technological Centre Scientific-Manufacturing Complex

Author for correspondence.
Email: R.Tikhonov@tcen.ru
Russian Federation, Moscow

References

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Supplementary files

Supplementary Files
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2. Fig. 1. Magnetic force microscopy (MFM) of Fe7Ni93 sample with band domains.

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3. Fig. 2. Microscopic image on 0.5 × 0.5 mm area of the domain structure of S1(FeCo) and S4(Fe38Co37Ni25) samples obtained using the Kerr effect when subjected to magnetic fields.

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4. Fig. 3. Dependences of saturation of specific magnetisation B/h and iron content Fe, Co, Ni in Co-Ni-Fe films on current density J at the cathode during electrochemical deposition process with concentrations of FeCl2 - 4H2O, CoCl2 - 6H2O, NiCl2 - 6H2O salts in 0.5 M electrolyte at pH 1.5 and anode-cathode gap LA-K = 30 mm.

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5. Fig. 4. Dependences of saturation specific magnetisation B/h, deposition rate V and coercivity Hc in Co-Ni-Fe films on current density J.

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6. Fig. 5. Dependences of Co-Ni-Fe film composition and deposition rate on current density J.

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7. Fig. 6. Dependences of relative deflection of silicon wafers D/h, relative saturation induction Vnas /h and coercive force Hc of Co-Ni-Fe films on current density J.

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8. Fig. 7. Magnetisation of Co-Ni-Fe films in a magnetic field up to 10 E.

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9. Fig. 8. Surface images of samples 1 (a) and 2 (b) obtained on magnetic force microscope.

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10. Fig. 9. Aligned diffractograms of samples 1 and 2 of Fig. 8.

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11. Fig. 10. Phase structure of Fe-Co-Ni ternary alloy films as a function of composition [12]. The circle indicates the composition of Co60Ni20Fe20 films.

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12. Fig. 11. Dependence of Ni-Fe alloy magnetisation on composition.

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13. Fig. 12. X-ray diffractograms of Ni-Fe alloy at iron content of 10, 24, 58 and 75%.

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