TY - JOUR
T1 - Superconductivity of ε-Fe
T2 - Complete resistive transition
AU - Jaccard, D.
AU - Holmes, A.T.
AU - Behr, G.
AU - Inada, Y.
AU - Onuki, Y.
PY - 2002/7/1
Y1 - 2002/7/1
N2 - Last year, iron was reported to become superconducting at temperatures below 2 K and pressures between 15 and 30 GPa, Nature 412 (2001) 316. The evidence presented was a weak resistivity drop, suppressed by a magnetic field above 0.2 T, and a small Meissner signal. However, a compelling demonstration, such as the occurrence of zero resistance, was lacking. Here we report the measurement of a complete resistive transition at 22.2 GPa with an onset slightly above 2 K in two very pure samples of iron, of different origins. The superconductivity appears unusually sensitive to disorder, developing only when the electronic mean free path is above a threshold value, while the normal state resistivity is characteristic of a nearly ferromagnetic metal.
AB - Last year, iron was reported to become superconducting at temperatures below 2 K and pressures between 15 and 30 GPa, Nature 412 (2001) 316. The evidence presented was a weak resistivity drop, suppressed by a magnetic field above 0.2 T, and a small Meissner signal. However, a compelling demonstration, such as the occurrence of zero resistance, was lacking. Here we report the measurement of a complete resistive transition at 22.2 GPa with an onset slightly above 2 K in two very pure samples of iron, of different origins. The superconductivity appears unusually sensitive to disorder, developing only when the electronic mean free path is above a threshold value, while the normal state resistivity is characteristic of a nearly ferromagnetic metal.
U2 - 10.1016/S0375-9601(02)00725-9
DO - 10.1016/S0375-9601(02)00725-9
M3 - Article
AN - SCOPUS:0036646177
SN - 0375-9601
VL - 299
SP - 282
EP - 286
JO - Physics Letters A
JF - Physics Letters A
IS - 2-3
ER -