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Coercivity in nanostructured FeCo-based powders prepared by mechanical alloying

Published online by Cambridge University Press:  26 February 2011

Qi Zeng ,
Ian Baker ,
Virginia McCreary  and
Zhicheng Yan
Qi Zeng
Affiliation:
qi.zeng@dartmouth.edu, Dartmouth College, Thayer School of Engineering, HB8000, Hanover, NH, 03755, United States
Ian Baker
Affiliation:
Ian.Baker@dartmouth.edu, Dartmouth College, Thayer School of Engineering, Hanover, NH, 03755, United States
Virginia McCreary
Affiliation:
vm@2447columbia.edu, Columbia University, Department of Materials Science and Engineering, New York, NY, 10027, United States
Zhicheng Yan
Affiliation:
zcyan@physics.udel.edu, University of Delaware, Department of Physics and Astronomy, Newark, DE, 19716, United States
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Abstract

FeCo-based nanostructured powders were prepared by mechanical alloying and subsequently heat treated in an attempt to reduce their coercivity, HC. Although the powders had grain sizes smaller than the magnetic exchange length, a low HC, as expected from Herzer's model, did not occur. The results of magnetic measurements on dilute and concentrated samples of the powder, as well as measurements of the temperature dependence of the magnetic properties from 10-300 K, indicate that the degree of magnetic interaction between the individual powder particles determines the relatively high HC of 10-20Oe at room temperature.

Keywords

nanostructuremagnetic propertiesmechanical alloying
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II06-09
Copyright
Copyright © Materials Research Society 2007

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