Stoichiometry issues in pulsed laser deposition of the ferromagnetic alloy NiMnSb
AuthorGrigorescu, C. E. A.
Manea, S. A.
PublisherAffiliation: NIRDO, Bucharest
Affiliation: MADIREL, Univ. Provence Centre St. Charles, Marseille, France
Affiliation: Natl. Inst. Res. Devmt. Mat. Phy., Bucharest
Affiliation: Foundation for Res. and Technology, HELLAS, Inst. Electron. Structure and Laser, Heraklion, Crete, Greece
Correspondence Address: Grigorescu, C.E.A.
SourceProceedings of SPIE - The International Society for Optical Engineering
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We report on the reproducible growth of stoichiometric thin films of ferromagnetic intermetallic compound NiMnSb by pulsed laser deposition (PLD) on various substrates. The films are grown at moderate temperature (around 200°C) using polycrystalline targets. Two different substrates were employed - single crystalline silicon and InAs polycrystalline - to investigate the influence of the thin layer/substrate lattice mismatch on the quality of the grown film. XRD and EDX analyses indicate that the layers are of high crystalline quality and their stoichiometry is very close to that of the corresponding targets, respectively. SEM images show that there are droplets on the surface of the films and their composition is similar to that of the targets. Magnetic measurements performed at both room temperature and 5K find that the investigated samples have small Hc values.