Gradually Devitrified Co-Based Metallic Glass As a Model Material for Testing Néel's Theory of the Rayleigh Rule

• Authors: H. Lachowicz , F. Popławski , S. Kane , M. Kuźmiński , T. Kulik
• Languages of publication: EN

Abstracts

EN

It is shown in the present paper that gradually devitrified Co-based non-magnetostrictive metallic glass is an excellent model material to verify Louis Néel's theory of the Rayleigh rule. In the course of the calculations, Néel showed that the parameter p=bH_{c}a (where H_{c} is the coercivity, a and b are the coefficients of a quadratic polynomial expressing the Rayleigh rule) is expected to range between 0.6 (hard magnets) and 1.6 (soft). However, the experimental values of this parameter, reported in the literature for a number of mono- and poly-crystalline magnets, are much greater than those expected from the theory presented by Néel (in some cases even by two orders of magnitude). The measurements, performed for a series of Co-based metallic glass samples annealed at gradually increasing temperature to produce nanocrystalline structures with differentiated density and size of the crystallites, have shown that the calculated values of the parameter p fall within the range expected from Néel theory.

Keywords

EN

75.50.Kj; 75.60.Ej

Discipline

• 75.60.Ej: Magnetization curves, hysteresis, Barkhausen and related effects(for hysteresis in ferroelectricity, see 77.80.Dj)
• 75.50.Kj: Amorphous and quasicrystalline magnetic materials

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1999
• Volume: 95
• Issue: 2
• Pages: 287-296

Dates

published

1999-02

received

1998-11-11

(unknown)

1998-12-23

Contributors

author

H. Lachowicz

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland,
• College of Science, Al. Lotników 32/46, 02-668 Warszawa, Poland,

author

F. Popławski

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland,
• College of Science, Al. Lotników 32/46, 02-668 Warszawa, Poland,

author

S. Kane

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland,

author

M. Kuźmiński

• Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland,

author

T. Kulik

• Department of Materials Science & Engineering, Warsaw University of Technology, Narbutta 85, 02-524 Warszawa, Poland

Identifiers

DOI

10.12693/APhysPolA.95.287