Magnetic and Superconducting Transitions in Gd/sub X/Er/sub 1-X/Rh sub 4 B sub 4 and Gd/sub X/Y/sub 1-X/Rh sub 4 B sub 4

摘要

The magnetic and superconducting transition temperatures and upper critical fields have been measured for Gd/sub x/Er/sub 1-x/Rh sub 4 B sub 4 and Gd/sub x/Y/sub 1-x/Rh sub 4 B sub 4 . The pressure dependence of T/sub c/ for the Er system for x less than or equal to 0.05 is 0.5 x 10 exp -2 K/kbar. Both systems exhibit reentrant behavior, that is a superconducting transition followed by a magnetic transition at a lower temperature that destroys the superconductivity. For the Er system, the initial additions of Gd actually raise the superconducting critical field followed by the expected decrease for greater additions. (ERA citation 03:019134)