J. Phys. IV France 08 (1998) Pr2-221-Pr2-224
Magnetomechanical coupling, magnetostriction and structure the as-quenched and annealed in vacuum Fe-Cu-W-Si-B alloyZ. Kaczkowski1, L. Lanotte2, M. Müller3 and P. Ruuskanen4
1 Polish Academy of Sciences, Institute of Physics, Al. Lotników 32/46, 02-668 Warszawa, Poland
2 Department of Physical Sciences, Naples University, Piazzale V. Tecchio 80, 80125 Naples, Italy
3 Institute of Solid State and Materials Research e. V., Helmholtzstrasse 20, 01171 Dresden, Germany
4 VTT Manufacturing Technology, Materials Technology, 33101 Tampere, Hermiankatu 12 B, Finland
Magnetomechanical coupling coefficient as a function of magnetic bias field in Fe23.5Cu1W3Si15.5B7 alloy in as-quenched state and after annealing in vacuum for 1 h from 400 to 500°C were investigated. The maximum values of the k coefficient were equal to 0.10-0.14 for as-quenched state and increased to 0.61 after annealing at 450°C. The results were somewhat worse than those with Nb instead of the W. Nanocrystallization begins after annealing above 450°C and the magnetostriction rapidly drops and the magnetomechanical coupling practically vanishes after annealing at 520°C.
© EDP Sciences 1998