Strong diamagnetic response and specific heat anomaly above Tc in underdoped La2−xSrxCuO4

Thisted, U.; Nyhus, J.; Suzuki, Takashi; Hori, J.; Fossheim, K.

doi:10.1016/j.physc.2003.11.028

Physica C: Superconductivity

2004

DOI: 10.1016/j.physc.2003.11.028

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Strong diamagnetic response and specific heat anomaly above Tc in underdoped La2−xSrxCuO4

U. Thisted¹,

J. Nyhus²,

Takashi Suzuki³

et al.

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“…To observe S-shaped dependence, the applied ac field amplitude has to be very low. Recently, such dependence was observed also on La 2−x Sr x CuO 4 samples, using the modified Quantum Design magnetometer [7]. One can hardly expect that this transition relates to the first-order melting transition in vortex matter [8].…”

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confidence: 91%

Scattering approach to the magnetic susceptibility of high-temperature superconductors

Janú

Tsoi

2003

Europhys. Lett.

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We study the dc and ac magnetic susceptibility of high-temperature superconductors in weak magnetic fields. The high-resolution magnetic measurements were done using the non-commercial SQUID magnetometer with the sample in a properly quiet electromagnetic surrounding. The sample is in a residual external ac field smaller than 1 nT and the typical applied ac field is about 1 μT. We show that the interpretation of the temperature dependence of the susceptibility measured under these conditions cannot be based on temperature-dependent suprefluid density, but can be interpreted as due to temperature-dependent electron scattering.

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confidence: 91%

Scattering approach to the magnetic susceptibility of high-temperature superconductors

Janú

Tsoi

2003

Europhys. Lett.

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Strong diamagnetic response and specific heat anomaly above Tc in underdoped La2−xSrxCuO4

Cited by 1 publication

References 15 publications

Scattering approach to the magnetic susceptibility of high-temperature superconductors

Scattering approach to the magnetic susceptibility of high-temperature superconductors

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