Reflectance magnetic circular dichroism studies at the Γ-point in InMnAs semiconductor films

Parashar, N. D.; Chiu, Philip; Wessels, Bruce W.

doi:10.1016/j.physe.2008.12.027

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…They are responsible for high T c values of this material. However, room temperature measurements of magneto-optical properties of ferromagnetic InMnAs showed that s, p-d exchange interactions related to the hole mediated ferromagnetism were also present [7]. As there are two mechanisms that stabilize ferromagnetism in InMnAs at room temperature, one can consider suppressing one of them.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of InMnAs nanodots prepared by MOVPE

Novák

Dujavová

Vávra

et al. 2013

Journal of Magnetism and Magnetic Materials

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Section: Introductionmentioning

confidence: 99%

Magnetic properties of InMnAs nanodots prepared by MOVPE

Novák

Dujavová

Vávra

et al. 2013

Journal of Magnetism and Magnetic Materials

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“…Such complexes are thought to be responsible for the high values of T c in ferromagnetic InMnAs. However, the room temperature measurement of magneto-optical properties of the material showed that hole-mediated ferromagnetism was also generated via s, p-d exchange interactions [11]. As InMnAs becomes ferromagnetic at room temperature via both mechanisms, one could attempt to suppress one of them through an appropriate growth mode.…”

Section: Introductionmentioning

confidence: 99%

Role of growth mode in the formation of magnetic properties of InMnAs grown by MOVPE

Novák¹,

Vávra²,

Hasenöhrl³

et al. 2011

Journal of Crystal Growth

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High-field magnetic circular dichroism in ferromagnetic InMnSb and InMnAs: Spin-orbit-split hole bands andgfactors

et al. 2015

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Carrier-induced ferromagnetism in magnetic III-V semiconductors has opened up several opportunities for spintronic device applications as well as for fundamental studies of a material system in which itinerant carriers interact with the localized spins of magnetic impurities. In order to understand the hole mediated ferromagnetism, probing the band structure in these material systems is crucial. Here we present magnetic circular dichroism (MCD) studies on MOVPE grown InMnSb and InMnAs, both with the Curie temperatures above 300 K. The measurements were performed on samples with different Mn contents with the excitation energy tuned from 0.92-1.42 eV and external magnetic fields up to 31 Tesla. The large g-factors in these systems allow us to measure the MCD at relatively high temperatures (190 K). These measurements are compared with MCD calculations based on an 8 band Pidgeon-Brown model which is generalized to include the coupling between the electron/hole and the Mn spin in a ferromagnetic state. Comparison of the observed MCD with the theoretical calculations provides a direct method to probe the band structure including the temperature dependence of the spin-orbit split-off gap and g-factors, and to estimate the sp-d coupling constants.

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Reflectance magnetic circular dichroism studies at the Γ-point in InMnAs semiconductor films

Cited by 4 publications

References 17 publications

Magnetic properties of InMnAs nanodots prepared by MOVPE

Magnetic properties of InMnAs nanodots prepared by MOVPE

Role of growth mode in the formation of magnetic properties of InMnAs grown by MOVPE

High-field magnetic circular dichroism in ferromagnetic InMnSb and InMnAs: Spin-orbit-split hole bands andgfactors

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