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Magnetic field control of hysteretic switching in Co/Al2O3 multilayers by carrier injection
Author(s) -
Alan Kalitsov,
Ajeesh M. Sahadevan,
S. Narayana Jammalamadaka,
K. Gopinadhan,
Charanjit S. Bhatia,
Guangcheng Xiong,
Hyunsoo Yang
Publication year - 2011
Publication title -
aip advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.421
H-Index - 58
ISSN - 2158-3226
DOI - 10.1063/1.3666854
Subject(s) - condensed matter physics , magnetic field , materials science , electron , hysteresis , magnetic hysteresis , thermal conduction , voltage , magnetization , physics , quantum mechanics , composite material
We propose a theoretical model of magnetic field dependence of hysteretic switching in magnetic granular system. The model is based on the self-trapped electrons mechanism. Our calculations show that the switching voltage may be significantly decreased with increasing the magnetic field. The underlying mechanism is the influence of the magnetic field on electron occupation of the conduction band, which depends on the materials used in magnetic granular system, concentration of magnetic granules in the insulating matrix, applied voltage, and the charge accumulation on the granules. We support our theoretical calculations by measuring the magnetic field dependence of resistive switching behaviour in Co/Al2O3 granular multilayers. Our experimental results are in qualitative agreement with the proposed theory

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