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Magnitude and range of the RKKY interaction in SmRh/sub 4/B/sub 4/

Conference ·
OSTI ID:5490534
The superconductive and magnetic transition temperatures, taken together, are shown to provide a unique probe which separately determines both the magnitude and range of the RKKY interaction in the RERh/sub 4/B/sub 4/ magnetic-superconductors (RE = Er, Sm). Experimentally, an unexpected peak is found in the antiferromagnetic ordering temperature of SmRh/sub 4/B/sub 4/ vs electron mean free path, while for ErRh/sub 4/B/sub 4/ the ferromagnetic ordering temperature decreases monotonically. These qualitative features, as well as the quantitative differences between SmRh/sub 4/B/sub 4/ and ErRh/sub 4/B/sub 4/, are in excellent agreement with calculations using a mean free path dependent RKKY interaction.
Research Organization:
Argonne National Lab., IL (USA)
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5490534
Report Number(s):
CONF-850890-12; ON: DE85014968
Country of Publication:
United States
Language:
English