The adaptation of the incommensurate structure modulation in Ca(2)CoSi(2)O(7) (dicalcium cobalt disilicate) single crystals to decreasing temperature has been examined using in situ high-resolution transmission electron microscopy and electron diffraction. The transition from the incommensurate to the commensurate lock-in phase of Co-åkermanite exhibits a pronounced hysteresis of a highly strai...

Abstract Materials exhibiting zero thermal expansion (ZTE), namely, volume invariance with temperature change, can resist shock and are highly desired in modern industries for high-precision components. However, pure ZTE materials rare, especially those that metallic. Here, we report the discovery of a metallic material: an orthorhombic Mn 1- x Ni CoSi spiral magnet. The introduction efficientl...

Uniform epitaxial CoSi2 layers have been grown in situ on a ~100! Si substrate at temperatures above 600 °C by reactive chemical-vapor deposition of cyclopentadienyl dicarbonyl cobalt, Co~h-C5H5!~CO!2 . Co-rich phases such as Co2Si and CoSi were suppressed during cobalt metallorganic chemical-vapor deposition at substrate temperatures above 500 °C. A thin carbon layer was found on the top of th...

[1] Although evidence is mounting that links global warming to changes in atmospheric dynamics over the Atlantic realm, similar studies over the African continent are lacking. And even if such models would exist, it would be difficult to verify their validity due to the paucity of meteorological observations and anemometers in the central Sahara. A pragmatic way around this problem is to monito...

The Karakoram Anomaly has been intensively investigated, but the factors that control this anomaly, such as glacier velocity, topography, and mass balance, remain poorly understood. To improve our understanding of balance Glacier, in study, spatiotemporal variability four velocities Hunza Basin range were surveyed using co-registration optically sensed images correlation (COSI-Corr) on Landsat ...