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Structural and magnetic properties of GeMn layers; High Curie temperature ferromagnetism induced by self organized GeMn nano‐columns
Author(s) -
Devillers T.,
Jamet M.,
Barski A.,
Poydenot V.,
Dujardin R.,
Bayle Guillemaud P.,
Rothman J.,
Bellet Amalric E.,
Cibert J.,
Mattana R.,
Tatarenko S.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200673026
Subject(s) - curie temperature , nanoclusters , ferromagnetism , materials science , nano , condensed matter physics , hall effect , analytical chemistry (journal) , nanotechnology , chemistry , magnetic field , composite material , physics , chromatography , quantum mechanics
Abstract In this paper we report on the structural and magnetic properties of GeMn layers grown on Ge(001). We show that for the optimized Mn concentration (6%) and for optimized growth temperature (close to 130 °C), GeMn samples exhibit a high Curie temperature (higher than 400 K) and Anomalous Hall Effect up to room temperature. Our GeMn layers grown at low temperature (70 °C to 130 °C) are composed of vertical Mn‐rich nano‐colums. Samples grown at temperatures higher than 130 °C contain GeMn nanoclusters. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)