Measurement by EPR of the penetration depth in the high-Tc superconductors TlBa2Ca2Cu3Ox and Bi2Ca2SrCu2Ox

B. Rakvin; T. A. Mahl; A. S. Bhalla; Z. Z. Sheng; N. S. Dalal

doi:10.1103/PhysRevB.41.769

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Measurement by EPR of the penetration depth in the high-Tc superconductors TlBa2Ca2Cu3Ox and Bi2Ca2SrCu2Ox

B. Rakvin, T. A. Mahl, A. S. Bhalla, Z. Z. Sheng, N. S. Dalal

DOI 10.1103/PhysRevB.41.769 · Physical Review B

T1

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Abstract

Using a newly devleoped EPR spin-probing methodology, we have measured magnetic penetration depth λ for Tl2Ba2Ca2Cu3Ox and Bi2Ca2SrCu2Ox. The temperature dependence of λ is found to follow the relationship λ=λ0[1-(T/Tc)4]−1/2, with λ0=2520±100 Å and Tc=119 K for Tl2BaCa3Cu3O7.8+x and λ0=2700±100 Å with Tc=84 K for Bi2Ca2SrCu2Ox.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Tl2Ba2Ca2Cu3Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	119	Pressure not reported	unknown
Bi2Ca2SrCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	84	Pressure not reported	unknown
Bi2Ca2SrCu2Ox Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	82	Pressure not reported	unknown
YBa2Cu3O7-x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi4Ca3Sr3Cu4O16 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown