Growth of eutectic composites in the InSb–MnSb system

Eutectic composites in the InSb–MnSb system have been grown by the Bridgman method in vertical geometry using a growth charge of eutectic composition. The composites consisted of a [110]-oriented single-crystal InSb matrix and single-crystal MnSb needles aligned in the growth direction. As the solid...

Full description

Saved in:
Bibliographic Details
Published in:Inorganic materials 2016-03, Vol.52 (3), p.268-273
Main Authors: Marenkin, S. F., Kochura, A. V., Fedorchenko, I. V., Izotov, A. D., Vasil’ev, M. G., Trukhan, V. M., Shelkovaya, T. V., Novodvorsky, O. A., Zheludkevich, A. L.
Format: Article
Language:English
Subjects:
Anisotropy
Chemistry
Chemistry and Materials Science
Electrical resistivity
Eutectic composites
Ferromagnetism
Indium antimonides
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Needles
Single crystals
Solidification
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Eutectic composites in the InSb–MnSb system have been grown by the Bridgman method in vertical geometry using a growth charge of eutectic composition. The composites consisted of a [110]-oriented single-crystal InSb matrix and single-crystal MnSb needles aligned in the growth direction. As the solidification rate was raised from 0.5 to 6 mm/h, the length of the needles increased, whereas their diameter dropped from 20 to 4 µm. Further raising the solidification rate led to spontaneous crystallization. Characteristically, the electrical and magnetic properties of the eutectic composites in the InSb–MnSb system were found to exhibit large anisotropy. The low-temperature resistivity of the composites across the needles is four to five times that along the needles. With increasing temperature, the resistivity ratio drops by up to a factor of 2–3. This can be accounted for in terms of a geometric factor. The electrical conductivity of the composites is determined primarily by the MnSb phase, whose volume along the growth direction was considerably larger. According to magnetic measurements, the eutectic composites in the InSb–MnSb system are ferromagnets with a Curie temperature of ≃ 600 K.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168516030110