Antiferromagnetic coupling between spinel ferrite and alpha-Fe layers in Fe3-delta O4/MgO/Fe(001) epitaxial films

作者：Yanagihara Hideto^*; Toyoda Yuta; Kita Eiji

来源：Journal of Physics D: Applied Physics , 2011, 44(6): 064011.

DOI：10.1088/0022-3727/44/6/064011

We have investigated interlayer exchange coupling (IEC) in epitaxial films of both Fe3O4/MgO/Fe(0 0 1) and gamma-Fe2O3/MgO/Fe(0 0 1). Depending on the thickness of the MgO spacer, both systems exhibit strong antiferromagnetic IEC of -1 to -2 erg cm(-2). The gamma-Fe2O3/MgO/Fe(0 0 1) trilayer exhibits the strongest IEC when the thickness of the MgO spacer is approximately 7 angstrom, whereas the Fe3O4/MgO/Fe(0 0 1) trilayer exhibits the strongest IEC when the thickness of the MgO spacer is zero. The results suggest that two different types of exchange coupling exist in the magnetic trilayers which consist of metallic iron and spinel ferrite layers.

• 出版日期2011-2-16