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Title: Effect of degree of die upset on magnetic behavior in Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5}

Abstract

DC demagnetization (DCD), isothermal remanent magnetization (IRM), and reversible magnetization measurements were used to examine the magnetic reversal behavior in melt-quenched samples of composition Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5} subjected to different levels of thermomechanical deformation (die upsetting). The reversible magnetization measurements indicate that in the thermally demagnetized condition domain walls are present within the material for all levels of deformation. During demagnetization from a saturated state, domain walls are present in a minority of grains at low levels of deformation but these domain walls disappear at higher levels of deformation. This behavior is explained in terms of changes in the relative strengths of nucleation and pinning fields. Comparison of these results to previous results obtained on similar materials indicate that changes in the magnetization behavior with degree of deformation are more marked in samples which are free of Ga, indicating that Ga additions act to suppress the nucleation of new domain walls, presumably in the grain boundaries. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1];  [2]
  1. Department of Applied Science, Brookhaven National Laboratory, Upton, New York, 11973 (United States)
  2. Magnequench International, Inc., Anderson, Indiana (United States)
Publication Date:
OSTI Identifier:
20216274
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 87; Journal Issue: 9; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; NEODYMIUM ALLOYS; BORON ALLOYS; GALLIUM ALLOYS; IRON ALLOYS; COBALT ALLOYS; DEMAGNETIZATION; MAGNETIZATION; THERMOMECHANICAL TREATMENTS; DOMAIN STRUCTURE; DEFORMATION; EXPERIMENTAL DATA

Citation Formats

Crew, D. C., Lewis, L. H., Welch, D. O., and Panchanathan, V. Effect of degree of die upset on magnetic behavior in Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5}. United States: N. p., 2000. Web. doi:10.1063/1.372773.
Crew, D. C., Lewis, L. H., Welch, D. O., & Panchanathan, V. Effect of degree of die upset on magnetic behavior in Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5}. United States. doi:10.1063/1.372773.
Crew, D. C., Lewis, L. H., Welch, D. O., and Panchanathan, V. Mon . "Effect of degree of die upset on magnetic behavior in Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5}". United States. doi:10.1063/1.372773.
@article{osti_20216274,
title = {Effect of degree of die upset on magnetic behavior in Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5}},
author = {Crew, D. C. and Lewis, L. H. and Welch, D. O. and Panchanathan, V.},
abstractNote = {DC demagnetization (DCD), isothermal remanent magnetization (IRM), and reversible magnetization measurements were used to examine the magnetic reversal behavior in melt-quenched samples of composition Nd{sub 13.9}(Fe{sub 0.92}Co{sub 0.08}){sub 80.3}B{sub 5.3}Ga{sub 0.5} subjected to different levels of thermomechanical deformation (die upsetting). The reversible magnetization measurements indicate that in the thermally demagnetized condition domain walls are present within the material for all levels of deformation. During demagnetization from a saturated state, domain walls are present in a minority of grains at low levels of deformation but these domain walls disappear at higher levels of deformation. This behavior is explained in terms of changes in the relative strengths of nucleation and pinning fields. Comparison of these results to previous results obtained on similar materials indicate that changes in the magnetization behavior with degree of deformation are more marked in samples which are free of Ga, indicating that Ga additions act to suppress the nucleation of new domain walls, presumably in the grain boundaries. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.372773},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 9,
volume = 87,
place = {United States},
year = {2000},
month = {5}
}