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Your search keyword '"P. J. VICCARO"' showing total 2 results
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2 results on '"P. J. VICCARO"'

1. MÖssbauer Effect Study of the Absence of Fe Magnetism in Superconducting Sc2Fe3Si5 and Th7Fe3

Author

G. K. Shenoy, J.D. Cashion, D. Niarchos, P. J. Viccaro, and Charles M. Falco

Subjects
Superconductivity, Materials science, Mössbauer effect, Condensed matter physics, Magnetism, Mössbauer spectroscopy, Moment (physics), Cooper pair
Abstract

There are only a few Fe-based compounds which are superconducting since the depairing of Cooper pairs is unavoidable in the presence of an Fe moment. In Sc2Fe3Si5 and Th7Fe3, Mössbauer measurements on 57Fe show that there is no magnetism at the Fe site in either compound. The isomer shift values indicate the reason behind this identical magnetic behavior to be quite different in its electronic origin.

Published
1980
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2. MÖssbauer Effect Investigation of Hydrogen Rich Ternary Hydrides of YFe2 , DyFe2 and ErFe2

Author

P. J. Viccaro, B.D. Dunlap, D. Niarchos, and G. K. Shenoy

Subjects
Magnetic transition temperature, Magnetization, Crystallography, Materials science, Mössbauer effect, Hydrogen, chemistry, Hydride, Mössbauer spectroscopy, chemistry.chemical_element, Ternary operation, Magnetic exchange
Abstract

The hydrogen rich ternary hydride phases of RFe2Hx (R=Y Dy, Er) with x>4 have been investigated using 57Fe, 161Dy and 166Er Mössbauer spectroscopy and bulk magnetization. In all cases, the presence of hydrogen results in a dramatic reduction in the moment on Fe as well as the magnetic transition temperature. The data also imply a simultaneous weakening of the R-Fe magnetic exchange.

Published
1980
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