Accession Number : AD0768870

Title :   Studies of Magnetic Properties in Rare Earth Alloys at Cryogenic Temperatures.

Descriptive Note : Interim technical rept. Dec 69-Dec 72,

Corporate Author : AMERICAN UNIV WASHINGTON D C DEPT OF PHYSICS

Personal Author(s) : Segnan,Romeo ; Sweger,Daniel M.

Report Date : 31 DEC 1972

Pagination or Media Count : 97

Abstract : The research contributes to an understanding of the interactions responsible for the magnetic behavior of rare earth alloys on the atomic level as an essential step in correlating the basic interactions with the bulk properties of such alloys. Nuclear hyperfine magnetic (NHM) and quadrupolar (NHQ) interaction studies were performed using the 161Dy Mossbauer resonance in the magnetic system Dy(x)Gd(1-x). The NHM and NHQ interactions were measured as a function of concentration and temperature up to the Neel (Curie) points. The data for internal field strengths are compared to existing molecular field and spin-wave theories. (Modified author abstract)

Descriptors :   (*MOSSBAUER EFFECT, DYSPROSIUM), (*DYSPROSIUM, MAGNETIC PROPERTIES), (*GADOLINIUM ALLOYS, MAGNETIC PROPERTIES), (*RARE EARTH ELEMENTS, MAGNETIC PROPERTIES), CRYOGENICS, ALLOYS, ATOMIC ENERGY LEVELS, HYPERFINE STRUCTURE, QUADRUPOLE MOMENT, NUCLEAR SPINS

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE