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Possible use of the half-Hausler alloy NiMnSb in spintronics: synthesis and physical properties of arc melted NiMnSb and of NiMnSb thin films grown on InSb by pulsed laser deposition

Gardelis, S., Androulakis, J., Monnereau, O., Buckle, Philip Derek and Giapintzakis, J. 2005. Possible use of the half-Hausler alloy NiMnSb in spintronics: synthesis and physical properties of arc melted NiMnSb and of NiMnSb thin films grown on InSb by pulsed laser deposition. Journal of Physics: Conference Series 10 , pp. 167-170. 10.1088/1742-6596/10/1/041

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Abstract

We report the growth of single-phase, stoichiometric polycrystalline thin films of the half-Heusler ferromagnet NiMnSb, predicted to be half-metallic, on single crystal (100) InSb substrates heated at 200 °C by pulsed laser deposition (PLD). The NiMnSb target used for the PLD deposition was synthesized by arc melting and had a saturation magnetization, MS (5K) = 4μB/formula unit. The films exhibited saturation magnetization, MS (5K) = 4μB/formula unit and coercive fields of 2 Oe at 300 K, indicating good structural quality. The temperature dependence of the saturation magnetization shows that at low temperature (T < 200 K) the system behaves like a Heisenberg ferromagnet as expected for a half-metal, while at T > 200 K behaves like an itinerant ferromagnet.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Institute of Physics
ISSN: 1742-6588
Last Modified: 04 Jun 2017 04:53
URI: http://orca-mwe.cf.ac.uk/id/eprint/46190

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