Ferromagnetic Objects Magnetovision Detection System
M. Nowicki, R. Szewczyk (2013)
Materials, 6(12), 5593-5601
This paper presents the application of a weak magnetic fields magnetovision scanning system for detection of dangerous ferromagnetic objects. A measurement system was developed and built to study the magnetic field vector distributions. The measurements of the Earth’s field distortions caused by various ferromagnetic objects were carried out. The ability for passive detection of hidden or buried dangerous objects and the determination of their location was demonstrated.
Quantifying perpendicular magnetic anisotropy at Fe/MgO interface
C.-H. Lambert, A. Rajanikanth, T. Hauet, S. Mangin, E.E. Fullerton and S. Andrieu (2013)
Appl. Phys. Lett. 102, 122410
We show that Fe-MgO interfaces possess strong perpendicular magnetic anisotropy of 1 +/- 0.1 mJ/m2 (erg/cm2) in fully epitaxial MgO/V/Fe/MgO(001) and MgO/Cr/Fe/MgO(001) heterostructures. The sign and amplitude of the total anisotropy are quantified as a function of Fe thickness using SQUID magnetometry and ferromagnetic resonance. There is a transition from out-of-plane to in-plane anisotropy for 6 Fe monolayers in V/Fe/MgO and only 4 monolayers in Cr/Fe/MgO. A detailed study of the Fe magnetization and effective anisotropy in both systems explains this difference and quantifies the Fe-MgO interface anisotropy.