High magnetic field studies of HgSe far-infrared reflectivity

We report on the optical characterization of InN layers in the THz range and magnetic fields up to 13 T. The results are interpreted using the dielectric function formalism, with contributions of cyclotron resonance, phonons, plasmons and helicon wave excitations. We show how THz radiation transmission measurements can provide an optical contactless method of determining the quality (carrier density and momentum scattering rate) in the InN layers. phys. stat. sol. (a) 202, No. 4 (2005) / www.pss-a.com 591

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“…Such helicon waves are well known from studies of metals as well as strongly doped semiconductors (e.g. [8]). The simulations shown in Fig.…”

Section: Analysis and Discussionmentioning

confidence: 99%

Terahertz investigation of high quality indium nitride epitaxial layers

Meziani

Maleyre

Sadowski

et al. 2005

Physica Status Solidi (a)

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Infrared Spectroscopy

et al. 1996

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The effect of thermal treatment, composition and substrate on the texture and magnetic properties of FeCo thin films

Cooke

Wang

Watts

et al. 2000

J. Phys. D: Appl. Phys.

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Magnetostrictive FeCo films (thickness 300 nm) have been produced by RF magnetron sputter deposition. The effects of the substrate, composition and thermal treatment on the structural and magnetic properties of the films have been determined. Structural analysis was performed using transmission electron microscopy and x-ray diffraction. The magnetic properties, including magnetostriction, were determined by the magneto-optical Kerr effect, magnetic force microscopy and strain-modulated ferromagnetic resonance. It is found that the magnetic softness of the films is critically dependent on the texture and strain state of the film. With suitable choices of substrate, composition and thermal treatment, these parameters can be controlled, producing magnetically soft films while maintaining a high magnetostriction. The differential response of the magnetic anisotropy to strain in these films is comparable to the best values achieved by more involved manufacturing processes, such as multilayering, showing excellent potential for their use in magnetic sensors and actuators.

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High magnetic field studies of HgSe far-infrared reflectivity

Cited by 3 publications

References 21 publications

Terahertz investigation of high quality indium nitride epitaxial layers

Terahertz investigation of high quality indium nitride epitaxial layers

Infrared Spectroscopy

The effect of thermal treatment, composition and substrate on the texture and magnetic properties of FeCo thin films

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