10 research outputs found
The Realization of Artificial Kondo Lattices in Nanostructured Arrays
The interplay of magnetic energies in a Kondo lattice is the underlying
physics of a heavy fermion system. Creating an artificial Kondo lattice system
by localizing the moments in an ordered metallic array provides a prototype
system to tune and study the energetic interplay while avoiding the
complications introduced by random alloying of the material. In this article,
we create a Kondo lattice system by fabricating a hexagonally ordered
nanostructured array using niobium as the host metal and cobalt as the magnetic
constituent. Electrical transport measurements and magnetoresistivity
measurements of these artificial lattices show that the competing exchange
coupling properties can be easily tuned by controlling the impurity percentage.
These artificial Kondo lattice systems enable the exploration of an artificial
superconductor which should lead to a deep understanding of the role of
magnetism in unconventional superconductors.Comment: Artificial Magnetic Crystal
Forum on Weathering Steel for Highway Structures: Summary Report
DTFJ61-88-R-00079On July 12-13, 1988 the Office of Research, Development and Technology of the Federal Highway Administration hosted a forum on Weathering Steel for Highway Structures. This conference took place at the Ramada Hotel in Alexandria, Virginia. The major objectives of this forum were to examine the state of the art in weathering steel use and maintenance, to develop rules for its use in new construction, and for maintenance of existing structures. The forum brought together 131 participants representing Federal and State governments and industry. The forum was organized into four main sessions, including a panel discussion and several individual presentations. The report summarizes the forum