Magnetic switching in cobalt films by adsorption of copper

Article Abstract:

The magnetic properties of films are affected by the presence of non-magnetic layers over them. An atom of copper present on the surface of a cobalt film changes the spin of 500 cobalt atoms and the direction of magnetization changes. Although the entire film is affected by the presence of copper some localized switching in the spin of cobalt atoms is also seen. This localized switching is useful in the development of sensors in magnetic storage devices which require a 90 degree switch in the spins of the magnetic atoms.

Monomolecular films, Copper, Cobalt, Magnetic properties

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Quantum oscillations in a confined electron gas

Article Abstract:

The electrons of metals structured on nanometre length scales are subject to confinement effects governed by Friedel oscillations, and Rudermann-Kittel-Kasuya Yosida oscillations. Quantum oscillations have been detected in a three-dimensional confined electron gas. This was achieved through the insertion of a thin ferromagnetic cobalt film, inducing total spin polarization in the conduction electrons of the copper.

Quantum theory, Quantum mechanics, Electrons

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Deep seismic profile across a Proterozoic collision zone: surprises at depth

Article Abstract:

Seismic reflection images across the entire orogen reveal a broadly symmetric structure, with reflections linked to island rocks that dip beneath both bounding Archaean craters. There is a doubling of crustal thickness along crust-penetrating faults during the collision.

Seismic reflection method, Seismic reflection surveying

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