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Magnetic and Microstructural Aspects of the Bulk Metallic Glassy Materials Nd60Fe30Al10

Published online by Cambridge University Press:  21 March 2011

N. H. Dan ,
N. X. Phuc ,
V. H. Ky ,
N. M. Hong ,
N. Chau ,
N. H. Luong ,
C. X. Huu ,
R. W. Mccallum ,
M. J. Kramer  and
A. S. O'Connor
...Show all authors
N. H. Dan
Affiliation:
Institute of Materials Science, NCST, Hoang Quoc Viet Str., Hanoi, Vietnam
N. X. Phuc
Affiliation:
Institute of Materials Science, NCST, Hoang Quoc Viet Str., Hanoi, Vietnam
V. H. Ky
Affiliation:
Institute of Materials Science, NCST, Hoang Quoc Viet Str., Hanoi, Vietnam
N. M. Hong
Affiliation:
Institute of Materials Science, NCST, Hoang Quoc Viet Str., Hanoi, Vietnam
N. Chau
Affiliation:
Center for Materials Science, Department of Physics, Hanoi National University, Nguyen Trai Str., Hanoi, Vietnam
N. H. Luong
Affiliation:
Center for Materials Science, Department of Physics, Hanoi National University, Nguyen Trai Str., Hanoi, Vietnam
C. X. Huu
Affiliation:
Center for Materials Science, Department of Physics, Hanoi National University, Nguyen Trai Str., Hanoi, Vietnam
R. W. Mccallum
Affiliation:
Ames Laboratory, USDOE and Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
M. J. Kramer
Affiliation:
Ames Laboratory, USDOE and Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
A. S. O'Connor
Affiliation:
Ames Laboratory, USDOE and Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
K. W. Dennis
Affiliation:
Ames Laboratory, USDOE and Department of Materials Science and Engineering, Iowa State University, Ames, IA 50011, USA
L. H. Lewis
Affiliation:
Materials and Chemical Sciences Division, Energy Sciences and Technology Dept., Brookhaven National Laboratory, Upton, New York 11973-5000, USA
L. D. Tung
Affiliation:
International Training Institute for Materials Science, 1 Dai Co Viet Str., Hanoi, Vietnam
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Abstract

The ferromagnetic bulk metallic glass (BMG) Nd60Fe30Al10system exhibits extremely large coercivities at low temperature and moderate coercivities near room temperature. The magnetic hardness, as best evidenced by the onset of magnetic irreversibility, was studied in bulk suction-cast and melt-spun alloys with the nominal composition Nd60Fe30Al10. Systematic x-ray diffraction studies of the degree of crystallinity performed as a function of position within the bulk suction-cast samples is found to correlate with the variation in the room-temperature magnetic hysteresis character. X-ray diffraction data clearly shows the presence of both crystallites and amorphous material on the samples' outmost surfaces; the amorphous phase content increases with distance into the cast sample. These results underscore the importance of solidification conditions and attendant nanophase selection, on the resultant magnetic properties of this class of alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 674: Symposia T/U/V – Applications of Ferromagnetic and Optical Materials, Storage and Magnetoelectronics , 2001 , U2.6
Copyright
Copyright © Materials Research Society 2001

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References

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