TY - JOUR
T1 - DC magnetic penetration depth of UPt3and Sr2RuO 4
T2 - Implications for the superconducting order parameters
AU - Schuberth, Erwin A.
AU - Schöttl, Stephan
AU - Flachbart, Karol
AU - Sasaki, Takahiko
N1 - Funding Information:
We gratefully acknowledge financial support by DAAD, Germany.
PY - 2001
Y1 - 2001
N2 - In order to distinguish the superconducting phases of the title compounds we have studied their DC magnetic properties in low fields with a SQUID magnetometer. The magnetic penetration depth of UPt3 shows the second superconducting transition at Tc- when the field, is applied along the c-axis, but not with H⊥c. This result, combined with a power law behavior of λ at low temperatures, is most consistent with the two-dimensional E2u order parameter symmetry. Below 20mK we find an additional diamagnetic signal which we ascribe to the normal state magnetism. For Sr2RuO4, supposedly a p-wave superconductor, we find a sharp single diamagnetic transition at 1.08 K showing that our sample is of high quality, but there is no indication of an unusual superconducting behavior.
AB - In order to distinguish the superconducting phases of the title compounds we have studied their DC magnetic properties in low fields with a SQUID magnetometer. The magnetic penetration depth of UPt3 shows the second superconducting transition at Tc- when the field, is applied along the c-axis, but not with H⊥c. This result, combined with a power law behavior of λ at low temperatures, is most consistent with the two-dimensional E2u order parameter symmetry. Below 20mK we find an additional diamagnetic signal which we ascribe to the normal state magnetism. For Sr2RuO4, supposedly a p-wave superconductor, we find a sharp single diamagnetic transition at 1.08 K showing that our sample is of high quality, but there is no indication of an unusual superconducting behavior.
KW - Heavy-fermion systems
KW - SQUID magnetization
KW - Superconducting penetration depth
KW - Superconductivity
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U2 - 10.1016/S0304-8853(00)00792-7
DO - 10.1016/S0304-8853(00)00792-7
M3 - Article
AN - SCOPUS:78049354648
VL - 226-230
SP - 372
EP - 373
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - PART I
ER -