High pressure synthesis of late rare earth RFeAs(O,F) superconductors; R = Tb and Dy.
New TbFeAs(O,F) and DyFeAs(O,F) superconductors with critical temperatures T(c) = 46 and 45 K and very high critical fields, >or=100 T, have been prepared at 1100-1150 degrees C and 10-12 GPa, demonstrating that high pressure may be used to synthesise late rare earth derivatives of the recently reported RFeAs(O,F) (R = La-Nd, Sm, Gd) high temperature superconductors.
Bos
Jan-Willem G
JW
Centre for Science at Extreme Conditions, University of Edinburgh, King's Buildings, Mayfield Road, Edinburgh, UKEH9 3JZ.
Penny
George B S
GB
Rodgers
Jennifer A
JA
Sokolov
Dmitry A
DA
Huxley
Andrew D
AD
Attfield
J Paul
JP