Open Access. Powered by Scholars. Published by Universities.®

Physics Commons™

Open Access. Powered by Scholars. Published by Universities.®

Sy-Hwang Liou Publications

1985

Articles 1 - 3 of 3

Full-Text Articles in Physics

Crystalline And Amorphous Feti And Fe2Ti, C.L. Chien, Sy_Hwang Liou Jun 1985

Crystalline And Amorphous Feti And Fe2Ti, C.L. Chien, Sy_Hwang Liou

Sy-Hwang Liou Publications

Amorphous FeTi, Fe2Ti, and their crystalline counterparts are compared by measurements of x-ray diffraction, conductivity, and 57Fe Mössbauer spectroscopy. In FeTi one has the unique opportunity to compare a cubic crystal with its amorphous analog. X-ray diffraction and hyperfine interactions indicate no clear correlation between the crystalline and the amorphous states. The electrical conductivity exhibits distinctive behavior for the two states.

Go to article

Rapidly Quenched FeXTa100-X Alloys, C.L. Chien, Sy_Hwang Liou, B.K. Ha, K.M. Unruh Apr 1985

Rapidly Quenched FeXTa100-X Alloys, C.L. Chien, Sy_Hwang Liou, B.K. Ha, K.M. Unruh

Sy-Hwang Liou Publications

Binary alloys of FexTa100-x were made by high-rate sputtering. A sharply defined boundary separates the composition ranges in which crystalline alloys (93 ≤ x ≤100) and amorphous alloys (15 ≤ x ≤ 90) are formed. The amorphous alloys with Fe concentrations up to the threshold of xc ≈ 65 are nonmagnetic. For the samples with x > xc, the magnetic ordering temperature (Tc) varies monotonically with Fe content to 200 K for a-Fe90Ta10. However, the crystalline alloys, with slightly higher Fe content, are strongly ferromagnetic. Their T …

Go to article

Magnetic Properties And Hyperfine Interactions Of Amorphous Fe-Hf Alloys, Sy_Hwang Liou, G. Xiao, J.N. Taylor, C.L. Chien Apr 1985

Magnetic Properties And Hyperfine Interactions Of Amorphous Fe-Hf Alloys, Sy_Hwang Liou, G. Xiao, J.N. Taylor, C.L. Chien

Sy-Hwang Liou Publications

Alloys of FexHf100-x (20 ≤ x ≤ 100) were fabricated by a vapor-quench method. The amorphous state, as verified by x-ray diffraction, is realized over a wide composition range of 20 ≤ x ≤ 94. The magnetic phase diagram was determined. The variation with Fe content of the magnetic ordering temperature (Tc) in Fe-Hf amorphous alloys shows a maximum at xp≈87. In contrast, the effective magnetic hyperfine field and therefore the Fe moment increases monotonically with x. Amorphous pure Fe is likely to be magnetic (Tc ~200 K) with …

Go to article