Structure and relaxation effects in thin semiconducting films and quantum dots

Kumpf, Christian; Stahl, Andreas; Gierz, Isabella; Schumacher, C.; Mahapatra, S.; Lochner, Florian; Βrunner, Karl; Schmidt, G.; Molenkamp, L. W.; Umbach, E.

doi:10.1002/pssc.200775421

Cited by 5 publications

(1 citation statement)

References 37 publications

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“…15 The films were subsequently covered in situ by a 10 nm thick magnetron sputtered metal cap to avoid oxidation and surface relaxation. 28 The Mn content was controlled during growth via the temperature, and hence the flux, of the Mn effusion cell. Six different samples (see table I) were grown with increasing Mn concentration, sample 1 having the lowest and sample 6 the highest concentration of Mn.…”

Section: A Thin Film Growthmentioning

confidence: 99%

Tunable damping, saturation magnetization, and exchange stiffness of half-Heusler NiMnSb thin films

et al. 2015

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The half-metallic half-Heusler alloy NiMnSb is a promising candidate for applications in spintronic devices due to its low magnetic damping and its rich anisotropies. Here we use ferromagnetic resonance (FMR) measurements and calculations from first principles to investigate how the composition of the epitaxially grown NiMnSb influences the magnetodynamic properties of saturation magnetization MS, Gilbert damping α, and exchange stiffness A. MS and A are shown to have a maximum for stoichiometric composition, while the Gilbert damping is minimum. We find excellent quantitative agreement between theory and experiment for MS and α. The calculated A shows the same trend as the experimental data, but has a larger magnitude. Additionally to the unique inplane anisotropy of the material, these tunabilities of the magnetodynamic properties can be taken advantage of when employing NiMnSb films in magnonic devices.

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Section: A Thin Film Growthmentioning

confidence: 99%