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Journal of Superconductivity and Novel Magnetism

, Volume 31, Issue 10, pp 3371–3378 | Cite as

Chemically Synthesized FeCo Powder for Advanced Applications

  • Vasily A. Bautin
  • Nikita S. Kholodkov
  • Alexander G. Seferyan
  • Nikolai A. Usov
Original Paper
  • 80 Downloads

Abstract

Very weak stray magnetic fields, H ∼ 10− 4 Oe, of an assembly of FeCo particles of mesoscopic dimensions, d = 10–50 μm, are investigated using a sensitive scanning giant magneto-impedance magnetometer. Direct magnetic force microscopy measurement of individual FeCo particles reveals a complicated domain structure. It is proved, however, that the mean square value of the stray magnetic field of a dilute assembly of FeCo particles randomly distributed on the plane is a statistically well-defined quantity. It depends on the average particle diameter, average distance between the particles, and average particle magnetization per unit volume. It is shown that the average particle magnetization can be determined using a measured mean square value of the stray magnetic field and geometrical parameters of the assembly obtained from optical measurement.

Keywords

FeCo powder Chemical synthesis Magnetic properties Giant magneto-impedance magnetometer Stray magnetic field 

Notes

Acknowledgments

We acknowledge the funding from the Russian Ministry of Education and Science (Grant RFMEFI57815X0128).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.

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Authors and Affiliations

  1. 1.National University of Science and Technology “MISiS”MoscowRussia
  2. 2.Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave PropagationRussian Academy of Sciences (IZMIRAN)MoscowRussia

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