Clarification of enhanced ferromagnetism in Be-codoped InMnP fabricated using Mn/InP:Be bilayers grown by molecular beam epitaxy

Yoon Shon, Sejoon Lee, Im Taek Yoon, H. C. Jeon, D. J. Lee, T. W. Kang, J. D. Song, Chong S. Yoon, D. Y. Kim, C. S. Park

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Abstract

The p-type InMnP:Be epilayers were prepared by the sequential growth of Mn/InP:Be bilayers using molecular-beam-epitaxy and the subsequent in-situ annealing at 200-300 °C. In triple-axis x-ray diffraction patterns, the samples revealed a shoulder peak indicative of intrinsic InMnP. The ferromagnetic transition in InMnP:Be was observed to occur at the elevated temperature of ∼140 K, and the ferromagnetic spin-domains clearly appeared in magnetic force microscopy images. The improved ferromagnetic properties are attributed to the increased p-d hybridation due to high p-type conductivity of InMnP:Be (p ∼ 1020cm-3). The results suggest that enhanced ferromagnetism can be effectively obtained from Be-codoped InMnP.

Original languageEnglish
Article number192109
JournalApplied Physics Letters
Volume99
Issue number19
DOIs
StatePublished - 7 Nov 2011

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