Electrical resistivity of pressurized iron and Fe-Ru alloys

PEDRAZZINI, P.; JACCARD, D.

Buenos Aires

Workshop; At the Frontiers of Condensed Matter V; 2010

Centro Atómico Constituyentes (CNEA)

The p−Tphase diagram of iron is complex, displaying at least four solid phases with different magnetic properties. Hexagonal iron is the stable phase above 13GPa and its magnetic state, thought to be antiferromagnetic, is still the object of debate. Notably, between 13GPa and 31GPa an unconventional superconducting state develops. Iron-ruthenium alloys, Fe1−xRux, have a hexagonal structure for x >0.3. The magnetic ground state of these alloys is also under debate, and superconductivity has been reported only for very low Fe-content (i.e., x∼1). We will discuss differences and similarities of the pressure- and alloying-induced hexagonal phases of iron as probed by low temperature electrical resistivity measurements.