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Effect of pressure on the superconducting and magnetic critical temperatures of bct ternary ruthenium borides

Conference ·
OSTI ID:5053951
The effects of hydrostatic pressure to 21 kbar on the superconducting (T/sub c/) and magnetic (T/sub m/) critical temperatures are reported for thirteen body-centered tetragonal isomorphous compounds in the systems RERu/sub 4/B/sub 4/ and RE(Rh/sub 0/ /sub 85/Ru/sub 0/ /sub 15/)/sub 4/B/sub 4/ (RE=Pr,Nd,Gd,Tb,Dy,Ho,Er,Tm,Lu). Comparison of the two superconducting Lu compounds reveals a marked distinction between the volume dependence of T/sub c/ due to external pressure and the effect caused by alloying on the transition metal site which also affects unit cell volume. A contrasting behavior under pressure is observed for the magnetic and superconducting states for the three pairs of compounds comprised of RE=Dy,Ho,Er.
Research Organization:
Ames Lab., IA (USA); Iowa State Univ. of Science and Technology, Ames (USA). Dept. of Physics
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
5053951
Report Number(s):
IS-M-293; CONF-800954-2
Country of Publication:
United States
Language:
English