Offset susceptibility of superconductors
T. Ishida, R. B. Goldfarb, A. B. Kos, R. W. Cross
DOI 10.1103/PhysRevB.46.12080 · Physical Review B
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Abstract
The novel concept of offset susceptibility χ0 is presented for superconductors in applied fields Hdc+Hac sinωt. χ0 represents the dc component of the time-dependent magnetization M(t). For sintered YBa2Cu3O7, χ0 was measured as a function of Hac, Hdc, and temperature using a Hall probe magnetometer and Fourier analysis. For intragranular diamagnetism, χ0 behaves as the real part of complex fundamental susceptibility χ1′, confirming a London-like field penetration. However, χ0 arising from intergranular coupling is positive at temperatures just below the onset of the coupling transition, in good agreement with theoretical predictions of a simplified Kim critical-state model of magnetization.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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