THERMAL-STABILITY OF ELECTRICAL AND MAGNETIC-PROPERTIES OF A NANOCRYSTALLINE HF-NI ALLOY

The thermal stability of a nanocrystalline (NC) Hf11Ni89 alloy was stu died using X-ray diffraction, transmission electron microscopy, resist ivity measurements and magnetothermal analysis. Microstructure and com position evolution in the grain boundaries and nanograins prior to evi dent grain growth was detected, and it was shown that this evolution m ay have a significant influence on the electrical resistivity and magn etic properties of the sample. Our findings demonstrated that the ther mal stability of properties of NC materials is not necessarily equival ent to the grain-size stability of the same materials.