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Magneto‐optical investigation of high temperature ion implanted Mn x Ge 1– x alloy: evidence for multiple contributions to the magnetic response
Author(s) -
Verna A.,
D'Orazio F.,
Ottaviano L.,
Passacantando M.,
Lucari F.,
Impellizzeri G.,
Priolo F.
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.200673015
Subject(s) - materials science , ferromagnetism , magnetic semiconductor , ion , amorphous solid , alloy , kerr effect , hysteresis , condensed matter physics , magnetic hysteresis , atmospheric temperature range , magnetization , chemistry , crystallography , magnetic field , physics , metallurgy , organic chemistry , nonlinear system , quantum mechanics , meteorology
We have studied the magnetic properties of a 240 °C ion implanted MnGe alloy (100 keV, 2 × 10 16 ions/cm 2 ) by means of magneto‐optical Kerr effect (MOKE) hysteresis loops taken at different wavelengths in the visible/near‐infrared range and at different temperatures (12–180 K). The details of the MOKE response indicates that the magnetic properties of the sample are due to the contribution of multiple magnetic phases. These can be ascribed to the known coexistence of Mn atoms diluted in the mono‐crystalline Ge matrix and of amorphous semiconductive Mn‐rich precipitates embedded in it. Our results demonstrate that both phases contribute to the ferromagnetic ordering in Mn x Ge 1– x magnetic semiconductors. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)