Interfaces between antiferromagnetic CoO and ferromagnetic Fe are typically characterized by the development of Fe oxides. Recently, it was shown that the use of a proper ultra-thin Co buffer layer prevents the formation of Fe oxides [Brambilla et al., Appl. Surf. Sci. 362, 374 (2016)]. In the present work, we investigate the magnetic properties of such an interface, and we find evidence for an in-plane uniaxial magnetic anisotropy, which is characterized by a multijump reversal behavior in the magnetization hysteresis loops. X-ray photoemission spectroscopy and element-sensitive hysteresis loops reveal that the occurrence of such an anisotropy is a phenomenon developing at the very interface.
Magnetic anisotropy at the buried CoO/Fe interface
D. Giannotti, H. Hedayat, G. Vinai, A. Picone, A. Calloni, G. Berti, M. Riva, G. Bussetti, F. Boschini, P. Torelli, G. Panaccione, E. Carpene, C. Dallera, M. Finazzi, A. Brambilla; Magnetic anisotropy at the buried CoO/Fe interface. Appl. Phys. Lett. 5 December 2016; 109 (23): 232401. https://doi.org/10.1063/1.4971291
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