Au-Fe system

Autonomous Repair Mechanism of Creep Damage in Fe-Au and Fe-Au-B-N Alloys

The autonomous repair mechanism of creep cavitation during high-temperature deformation has been investigated in Fe-Au and Fe-Au-B-N alloys. Combined electron-microscopy techniques and atom probe tomography reveal how the improved creep properties result from Au precipitation within the creep cavities, preferentially formed on grain boundaries oriented perpendicular to the applied stress. The s...

Spin-dependent transport in Fe and Fe/Au multilayers

Subtle interface magnetism of Fe/Au multilayers

By ab initio LMTO calculations in atomic-sphere approximation we have studied the interlayer exchange coupling between Fe films separated by Au spacers in infinite Fe/Au multilayers with (001) interface orientation. We also performed detailed calculations of the magnetization and charge profiles across the system. We find an enhancement of the Fe moments at the interface, which amount to ≈ 2.8 ...

Footprints of Fe-oxide(-Cu-Au) systems

Recognizing footprints of Fe-oxide(-Cu-Au) ("IOCG") mineralization depends on the perspective that the beholder has on the nature and origin of these deposits. This follows from the fact that no simple descriptive model can adequately capture the diversity of the systems that are included in this family (any more than for epithermal deposits or similar broad classes). Nor, is there any semblanc...

Spin engineering with Fe – Au monolayers

FeAu superlattices were grown using MBE by alternative deposition of Fe(0 0 1) and Au(0 0 1) atomic layers. Polar MOKE loops taken at the room temperature showed that all superlattices with single Fe monolayers (MLs) were magnetized along the film normal but the character of the hysteresis loop depended strongly on the repetition number N in a (Fe1Au1)N stack, where Fe1Au1 denotes a single sequ...