Identification of the interstitial Mn site in ferromagnetic (Ga,Mn)As

We determined the lattice location of Mn in ferromagnetic (Ga,Mn)As using the electron emission channeling technique. We show that interstitial Mn occupies the tetrahedral site with As nearest neighbors (TAs) both before and after thermal annealing at 200 °C, whereas the occupancy of the tetrahedral...

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Published in:Applied physics letters 2015-01, Vol.106 (1)
Main Authors: Lima, T. A. L., Wahl, U., Augustyns, V., Silva, D. J., Costa, A., Houben, K., Edmonds, K. W., Gallagher, B. L., Campion, R. P., Van Bael, M. J., da Silva, M. R., Correia, J. G., Araújo, J. P., Temst, K., Vantomme, A., Pereira, L. M. C.
Format: Article
Language:English
Subjects:
ANNEALING
Applied physics
CHANNELING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON EMISSION
FERROMAGNETIC MATERIALS
FERROMAGNETISM
GALLIUM ARSENIDES
INTERSTITIALS
MANGANESE ARSENIDES
MANGANESE COMPLEXES
VISIBLE RADIATION
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cited_by cdi_FETCH-LOGICAL-c356t-ec524eefbfd2d86597398762939fa65e2867d6aa1578e921c9ea42fd94bc973b3
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container_issue 1
container_start_page
container_title Applied physics letters
container_volume 106
creator Lima, T. A. L.
Wahl, U.
Augustyns, V.
Silva, D. J.
Costa, A.
Houben, K.
Edmonds, K. W.
Gallagher, B. L.
Campion, R. P.
Van Bael, M. J.
da Silva, M. R.
Correia, J. G.
Araújo, J. P.
Temst, K.
Vantomme, A.
Pereira, L. M. C.
description We determined the lattice location of Mn in ferromagnetic (Ga,Mn)As using the electron emission channeling technique. We show that interstitial Mn occupies the tetrahedral site with As nearest neighbors (TAs) both before and after thermal annealing at 200 °C, whereas the occupancy of the tetrahedral site with Ga nearest neighbors (TGa) is negligible. TAs is therefore the energetically favorable site for interstitial Mn in isolated form as well as when forming complexes with substitutional Mn. These results shed new light on the long standing controversy regarding TAs versus TGa occupancy of interstitial Mn in (Ga,Mn)As.
doi_str_mv 10.1063/1.4905556
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subjects ANNEALING
Applied physics
CHANNELING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRON EMISSION
FERROMAGNETIC MATERIALS
FERROMAGNETISM
GALLIUM ARSENIDES
INTERSTITIALS
MANGANESE ARSENIDES
MANGANESE COMPLEXES
VISIBLE RADIATION
title Identification of the interstitial Mn site in ferromagnetic (Ga,Mn)As
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