Istituto dei materiali per l'elettronica ed il magnetismo     
Casoli F., Albertini F., Nasi L., Fabbrici S., Cabassi R., Bolzoni F., Bocchi C., Luches P. Role of interface morphology in the exchange-spring behavior of FePt/Fe perpendicular bilayers. In: Acta Materialia, vol. 58 (10) pp. 3594 - 3601. Elsevier, 2010.
The role of interface morphology in the magnetic behavior of FePt/Fe exchange-coupled systems has been considered. Hard/soft bilayers with different interface morphologies were obtained by depositing Fe thin layers on FePt epitaxial layers with different morphologies, but all with a high degree of L10 ordering and high coercivity. It was found that the hard/soft coupling can be tuned by changing the FePt morphology, allowing tailoring of the hysteresis loops and modification of the magnetic regime at a fixed Fe thickness (from Rigid Magnet to Exchange-Spring magnet). Remarkably, all bilayer series showed a drastic reduction in coercivity with increasing Fe thickness to 3.5 nm(0Hc<=1.1T).
URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TW8-4YMGBJ5-1&_user=6689909&_coverDate=06%2F30%2F2010&_alid=1602297719&_rdoc=1&_fmt=high&_orig=search&_origin=search&_zone=rslt_list_item&_cdi=5556&_sort=r&_st=13&_docanchor=&view=c&_ct=2&_acct=C0
DOI: 10.1016/j.actamat.2010.02.029
Subject Exchange-coupled media
Magnetic recording thin films

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