Metastable Phase Formation in Be-Nb Intermetallic Compounds

Electric Field Gradient at Nb Site in the Intermetallic Compounds

The electric field gradient (efg) at the Nb site in the intermetallic compounds Nb3X (X = Al, In, Si, Ge, Sn) was measured by the Perturbed Angular Correlation (PAC) method using the wellknown gamma-gamma cascade of 133 482 keV inTa from the decay of Hf, substituting approximately 0.1 atom percent of Nb. The PAC results show that Vzz drops by nearly 40% when X changes from Al to In, and by abou...

A metastable HCP intermetallic phase in Cu-Al bilayer films

Experimental formation enthalpies for intermetallic phases and other inorganic compounds

The standard enthalpy of formation of a compound is the energy associated with the reaction to form the compound from its component elements. The standard enthalpy of formation is a fundamental thermodynamic property that determines its phase stability, which can be coupled with other thermodynamic data to calculate phase diagrams. Calorimetry provides the only direct method by which the standa...

Intermetallic phase formation during arnnealing of AI/Ni muMayers

The phase evolution during annealing of AlJNi multilayer samples prepared by ion-beam sputtering with composition modulation wavelengths A between 10 and 400 nm was determined using x-ray diffraction and differential scanning calorimeter measurements. Samples with average compositions of &n,N10,6,, and Al,,,N&,~ were investigated. For the Al,,40Ni0.60 samples the following results were obtained...

Driving magnetostructural transitions in layered intermetallic compounds.

We report the dramatic effect of applied pressure and magnetic field on the layered intermetallic compound Pr(0.5)Y(0.5)Mn(2)Ge(2). In the absence of pressure or magnetic field this compound displays interplanar ferromagnetism at room temperature and undergoes an isostructural first order magnetic transition (FOMT) to an antiferromagnetic state below 158 K, followed by another FOMT at 50 K due ...