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Optical and magnetic properties of MnBi formed directly by ion beam mixing

Published online by Cambridge University Press:  31 January 2011

Yoshiaki Kido  and
Masa-aki Tada
Yoshiaki Kido
Affiliation:
Toyota Central Research and Development Laboratories, Inc., Nagakute cho, Aichi-gun, Aichi-ken, 480-11, Japan
Masa-aki Tada
Affiliation:
Toyota Central Research and Development Laboratories, Inc., Nagakute cho, Aichi-gun, Aichi-ken, 480-11, Japan
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Abstract

Multilayers of Mn/Bi were irrradiated with 400 keV Xe+ at temperatures from 80 to 550 K. Ferromagnetic MnBi layers oriented perpendicular to the substrate surface were formed directly at mixing temperatures from room temperature (RT) to 500 K. The measurements of Curie point and optical Faraday rotation revealed that 60–70 at. % of MnBi ion-mixed at RT is the metastable phase (QIITP: quenched high temperature phase). The fraction of QIITP is reduced with increase in mixing temperature. It was also found that ion beam mixing yields a pronounced protection effect against the deterioration of MnBi in a moist atmosphere. A detailed discussion is given on the kinetics of ion beam mixing and the growth mechanism of the metastable MnBi grains.

Type
Articles
Information
Journal of Materials Research , Volume 4 , Issue 5 , October 1989 , pp. 1151 - 1155
Copyright
Copyright © Materials Research Society 1989

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References

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