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Superconductivity and long-range magnetic order in ternary rare-earth transition-metal borides

Technical Report ·
OSTI ID:6658136
Many high superconducting transition temperature (T/sub c/) superconductors have been discovered in rare earth transition metal borides, such as some compounds in the primitive tetragonal RERh/sub 4/B/sub 4/, body-centered tetragonal RERu/sub 4/B/sub 4/ or orthorhombic RERuB/sub 2/ systems. The high transition temperatures present in many of those compounds as well as the regular sublattice of rare earth atoms provide an opportunity for studying the interaction of superconductivity and long range magnetic order. The close correlation between superconductivity, magnetic order and structural features is demonstrated with the study of the pseudoternary systems Er(Rh/sub 1-x/Ru/sub x/)/sub 4/B/sub 4/, Y(Rh/sub 1-x/Ru/sub x/)/sub 4/B/sub 4/ and (Lu/sub 1-x/Er/sub x/)RuB/sub 2/. The systematic investigation of the role of each atom in the particular ternary boride structure is addressed by low temperature measurements of electronic, transport and magnetic properties as well as by metallurgical methods. Results are reported.
Research Organization:
Ames Lab., IA (USA)
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
6658136
Report Number(s):
IS-T-1039; ON: DE83004794
Country of Publication:
United States
Language:
English