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Magnetic and electrical characteristics in dense Fe–Ni alloy cluster-assembled films prepared by energetic cluster deposition

Published online by Cambridge University Press:  31 January 2011

D.L. Peng ,
K. Sumiyama ,
K. Kumagai ,
T. Yamabuchi ,
D. Kobayashi  and
T. Hihara
D.L. Peng*
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
K. Sumiyama
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
K. Kumagai
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
T. Yamabuchi
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
D. Kobayashi
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
T. Hihara
Affiliation:
Department of Materials Science and Engineering, Nagoya Institute of Technology, Nagoya 466-8555, Japan
*
a)Address all correspondence to this author. Present address: Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China. e-mail: [email protected]
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Abstract

Fe–Ni alloy cluster-assembled films were obtained by a plasma–gas-condensation-type cluster-deposition method. We studied the magnetic and electrical properties of these assemblies prepared on an electrically grounded substrate [bias voltage (Va) = 0 kV] and on a negatively biased substrate (Va = −20 kV). The packing density and saturation magnetization per volume, Ms, are much larger for the assemblies prepared at Va = −20 kV than those prepared at Va = 0 kV, while the magnetic coercivity, Hc, and electrical resistivity, ρ, are much lower for the assemblies prepared at Va = −20 kV than those prepared at Va = 0 kV. For Ni-rich Fe–Ni alloy cluster-assembled films obtained at Va = −20 kV, the Hc values can become smaller than 160 A/m (the precision limit of our superconducting quantum interference device magnetometer) by adjusting the initial cluster size. The magnetic and electrical properties of Fe–Ni cluster-assembled films are much improved in comparison with those of pure Fe cluster-assembled films.

Keywords

Cluster assemblyElectrical propertiesMagnetic properties
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 1 , January 2008 , pp. 189 - 197
Copyright
Copyright © Materials Research Society 2008

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References

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