EPJ Web of Conferences
Volume 40, 2013JEMS 2012 – Joint European Magnetic Symposia
|Number of page(s)||4|
|Section||Micromagnetics, magnetization processes and magnetization dynamics|
|Published online||14 January 2013|
Influence of Cu seed layer on the magnetization reversal in exchange-biased FeMn/FeCo systems
Dipartimento di Scienze Fisiche e Chimiche, Università di L’Aquila, Via Vetoio 10, I-67100 Coppito ( AQ), Italy
2 CNISM at Dipartimento di Scienze Fisiche e Chimiche, Università di L’Aquila, I-67100 Coppito ( AQ), Italy
3 CNR-SPIN at Dipartimento di Scienze Fisiche e Chimiche, Università di L’Aquila, I-67100 Coppito ( AQ), Italy
Magnetization hysteresis loops are measured on FeMn/FeCo bilayers. The existence of the exchange bias effect up to room temperature is guaranteed by the presence of copper as a seed layer. We demonstrate that the choice of the growth parameters for Cu allows the control of the magnetic response of the structure, tuning the coercivity and the exchange field. The switching field distribution suggests different magnetization reversal mechanisms during the ascending and descending branches of the hysteresis loop. The evident noisy character of the data, during the reversal of the magnetization with respect to the initially set orientation, supports the picture of domain wall motion involving pinned states at magnetic defects, contrasting with the coherent magnetic moments rotation along the opposite branch.
© Owned by the authors, published by EDP Sciences, 2013
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