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Title: Structural aspects of magnetic softening in Fe-based metallic glass during annealing

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
FOREIGN
OSTI Identifier:
1327055
Resource Type:
Journal Article
Resource Relation:
Journal Name: Scripta Materialia; Journal Volume: 127
Country of Publication:
United States
Language:
ENGLISH

Citation Formats

Dai, J., Wang, Y. G., Yang, L., Xia, G. T., Zeng, Q. S., and Lou, H. B. Structural aspects of magnetic softening in Fe-based metallic glass during annealing. United States: N. p., 2017. Web. doi:10.1016/j.scriptamat.2016.09.006.
Dai, J., Wang, Y. G., Yang, L., Xia, G. T., Zeng, Q. S., & Lou, H. B. Structural aspects of magnetic softening in Fe-based metallic glass during annealing. United States. doi:10.1016/j.scriptamat.2016.09.006.
Dai, J., Wang, Y. G., Yang, L., Xia, G. T., Zeng, Q. S., and Lou, H. B. Sun . "Structural aspects of magnetic softening in Fe-based metallic glass during annealing". United States. doi:10.1016/j.scriptamat.2016.09.006.
@article{osti_1327055,
title = {Structural aspects of magnetic softening in Fe-based metallic glass during annealing},
author = {Dai, J. and Wang, Y. G. and Yang, L. and Xia, G. T. and Zeng, Q. S. and Lou, H. B.},
abstractNote = {},
doi = {10.1016/j.scriptamat.2016.09.006},
journal = {Scripta Materialia},
number = ,
volume = 127,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2017},
month = {Sun Jan 01 00:00:00 EST 2017}
}
  • Abstract
  • The stress level can be altered in soft magnetic amorphous alloys by hydrogen absorption. The resulting changes in the soft magnetic parameters are reversible or irreversible, depending on the chemical composition. Some of these effects are demonstrated in Fe-B, Fe-W-B, and Fe-V-B glassy ribbons, in which various magnetic parameters are measured mainly during hydrogen desorption. The rate of hydrogen desorption is also monitored by measuring the pressure change in a hermetically closed bomb. The observed phenomena are interpreted on the basis of induced stresses and chemical interactions between the solute metal and hydrogen.
  • We report the results of the complex susceptibility, temperature, and field dependence of DC magnetization and the nonequilibrium dynamics of a bulk metallic glass Fe{sub 40}Co{sub 8}Cr{sub 15}Mo{sub 14}C{sub 15}B{sub 6}Er{sub 2}. Solid indication of the coexistence of reentrant spin glass (SG) and ferromagnetic orderings is determined from both DC magnetization and AC susceptibility under different DC fields. Dynamics scaling of AC susceptibility indicates critical slowing down to a reentrant SG state with a static transition temperature T{sub s} = ∼17.8 K and a dynamic exponent zv = ∼7.3. The SG nature is further corroborated from chaos and memory effects, magnetic hysteresis, and aging behavior.more » We discuss the results in terms of the competition among random magnetic anisotropy and exchange interactions and compare them with simulation predictions.« less
  • The metallic glass Zr{sub 65}Al{sub 7.5}Cu{sub 27.5} exhibits a wide temperature range in the undercooled liquid region. This offers the possibility of examining the phenomena that occur during glass transition. We investigated this glass by x-ray diffraction and x-ray absorption spectroscopy (XAS) at room temperature and at elevated temperatures below and above the glass transition temperature. The total number of nearest neighbors determined by x-ray diffraction remained unchanged. Using XAS irreversible changes in the short range order (SRO) towards the SRO of crystalline Zr{sub 2}Cu is observed in the nearest neighbor shell which is consistent with the x-ray diffraction results.more » The long range order was not affected by these changes. From the temperature dependence of the atomic mean-square relative displacements {sigma}{sup 2}, Debye temperatures were determined and they compare well with low temperature specific heat measurements. Above T{sub g} the slope of {sigma}{sup 2} increases drastically and is attributed to anharmonic effects. {copyright} {ital 1997 American Institute of Physics.}« less