Effect of Low Temperature Annealing Upon Magnetic Properties of FeMoCuB Metallic Glass

Author

Hasiak, M. ; Miglierini, M.

Author_Institution

Dept. of Mech., Mater. Sci. & Eng., Wroclaw Univ. of Technol., Wrocław, Poland

Volume

51

Issue

1

fYear

2015

fDate

Jan. 2015

Firstpage

1

Lastpage

4

Abstract

The influence of low temperature annealing on microstructure and magnetic properties of the Fe₇₆Mo₈Cu₁B₁₅ metallic glass was studied. Non-monotonous change of the Curie temperature (T_C) of the amorphous phase in the samples subjected to isothermal annealing is observed. It is connected with structural relaxation of the amorphous matrix, which consequently yields chemical and/or topological modifications of the short-range order. After annealing at temperature well below the onset of crystallization, T_C first rises then assumes its original value. Structural rearrangement of the resonant ⁵⁷Fe nuclei is directly seen from the Mössbauer spectra. Thermomagnetic properties of the Fe₇₆Mo₈Cu₁B₁₅ alloy were studied in a wide range of measuring temperatures for understanding magnetic behavior of NANOPERM type metallic glasses exposed to low-temperature heat treatment, whereas the investigated alloys are still amorphous.

Keywords

Curie temperature; Mossbauer effect; boron alloys; copper alloys; crystallisation; iron alloys; magnetic annealing; magnetic relaxation; metallic glasses; molybdenum alloys; short-range order; thermomagnetic effects; Curie temperature; Fe₇₆Mo₈CuB₁₅; Mossbauer spectra; NANOPERM type metallic glasses; amorphous matrix; amorphous phase; chemical modification; crystallization; isothermal annealing; low temperature annealing effect; microstructure; resonant 57Fe nuclei; short-range order; structural rearrangement; structural relaxation; thermomagnetic properties; topological modification; Amorphous magnetic materials; Annealing; Magnetic hysteresis; Magnetization; Metals; Temperature; Temperature measurement; Amorphous soft magnetic materials; M??ssbauer spectroscopy; magnetic properties; magnetocaloric effect;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2014.2356796

Filename

7029206