Spin-Wave Excitations and Fluctuations of the Exchange Interaction in Amorphous Fe_{1-x}Zr_{x} Alloys

• Authors: P. Kossacki , T. Stobiecki , H. Szymczak
• Languages of publication: EN

Abstracts

EN

Detailed magnetization measurements were performed on amorphous Fe_{1-x}Zr_{x} alloys with 0.14 ≤ x ≤ 0.48 at temperatures ranging from 4.2 K to the Curie temperature in external magnetic field up to 5 T. An analysis of the experimental data reveals that' the fluctuations of the exchange integral resulting from the structural disorder give important contribution to the thermal demagnetization and high-field susceptibility of Fe-rich alloys. For Zr-rich alloys the effect of fluctuations of the exchange integral is negligible and thermal demagnetization is described in terms of spin-wave excitations. No Stoner single-particle excitations were observed for alloys with x > 0.14.

Keywords

EN

75.30.Cr; 75.50.Kj; 75.70.-i

Discipline

• 75.70.-i: Magnetic properties of thin films, surfaces, and interfaces(for magnetic properties of nanostructures, see 75.75.-c)
• 75.30.Cr: Saturation moments and magnetic susceptibilities
• 75.50.Kj: Amorphous and quasicrystalline magnetic materials

• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 83
• Issue: 6
• Pages: 785-791

Dates

published

1993-06

received

1992-09-18

(unknown)

1993-02-26

Contributors

author

P. Kossacki

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

author

T. Stobiecki

• Institute of Electronics, Academy of Mining and Metallurgy, Mickiewicza 30, 30-059 Krakow, Poland

author

H. Szymczak

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

Identifiers

DOI

10.12693/APhysPolA.83.785