Тип публикации: статья из журнала
Год издания: 2017
Идентификатор DOI: 10.1016/j.carbon.2016.12.060
Ключевые слова: Carbides, Carbon, Dichroism, High resolution transmission electron microscopy, Magnetoelectronics, Transmission electron microscopy, X ray absorption, Electronics production, Exchange bias effects, Experimental evidence, Magnetic interactions, Potential materials, Spintronics application, Theoretical modeling, X-ray magnetic circular dichroism, Magnetic materials
Аннотация: The exchange bias (EB) effect, which is the shift of the hysteresis loop of a ferromagnet in direct contact with an antiferromagnet, is highly advantageous for the development of spintronics applications. Carbon (C) has been considered as a potential material in next generation electronics production as well as spintronics devices Показать полностьюbeyond silicon. Here we show experimental evidence for an EB in C/Co composites. The significant EB needs thermal annealing to occur. X-ray absorption spectra and transmission electron microscopy data of these samples reveal that Co carbides in as grown samples decompose and form graphitic C/Co interfaces after annealing. Using x-ray magnetic circular dichroism we have detected the C spins that are responsible for the EB. These results inspire a theoretical model to investigate the magnetic interactions in graphitic C/Co interfaces and interpret the observed results. (C) 2016 Elsevier Ltd. All rights reserved.
Журнал: CARBON
Выпуск журнала: Vol. 114
Номера страниц: 642-648
ISSN журнала: 00086223
Место издания: OXFORD
Издатель: PERGAMON-ELSEVIER SCIENCE LTD