TY - JOUR
T1 - Strongly nonlinear magnetization above Tc in Bi 2Sr2CaCu2O8-δ
AU - Li, L. U.
AU - Wang, Yayu
AU - Naughton, M. J.
AU - Ono, S.
AU - Ando, Yoichi
AU - Ong, N. P.
PY - 2005/11/1
Y1 - 2005/11/1
N2 - Using high-resolution magnetometry we have investigated in detail the magnetization M above the critical temperature Tc in Bi 2Sr2CaCu2O8. In a broad range of temperature T above; Tc, we find that M(T, H) is strongly non-linear in the field H. We show that as T → Tc the susceptibility Χ(T, H) diverges to very large values (Χ → -1) if measured in weak H. In addition, M(H) displays an anomalous non-analytic form M ∼ H 1/δ in weak fields with a strongly T-dependent exponent δ(T). These features strongly support the proposal that, above T c, the pair condensate survives to support significant London rigidity.
AB - Using high-resolution magnetometry we have investigated in detail the magnetization M above the critical temperature Tc in Bi 2Sr2CaCu2O8. In a broad range of temperature T above; Tc, we find that M(T, H) is strongly non-linear in the field H. We show that as T → Tc the susceptibility Χ(T, H) diverges to very large values (Χ → -1) if measured in weak H. In addition, M(H) displays an anomalous non-analytic form M ∼ H 1/δ in weak fields with a strongly T-dependent exponent δ(T). These features strongly support the proposal that, above T c, the pair condensate survives to support significant London rigidity.
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U2 - 10.1209/epl/i2005-10254-4
DO - 10.1209/epl/i2005-10254-4
M3 - Article
AN - SCOPUS:27744496642
SN - 0295-5075
VL - 72
SP - 451
EP - 457
JO - Journal de Physique (Paris), Lettres
JF - Journal de Physique (Paris), Lettres
IS - 3
ER -