Showing papers by "Sheldon Schultz published in 1984"
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12 citations
TL;DR: In this paper, conduction-electron-spin resonance (CESR) measurements are performed on bilayers made from various pairs of the metals lithium, sodium, potassium, copper, and silver.
Abstract: A new technique is discussed which utilizes conduction-electron-spin resonance (CESR) in metal bilayers to determine the electron-spin susceptibility of metals. Transmission electron-spin resonance measurements are performed on bilayers made from various pairs of the metals lithium, sodium, potassium, copper, and silver. These measurements allow a determination of the ratio of the electron-spin susceptibilities of the two metals constituting the bilayer. Combining previously measured values of the electron-spin susceptibility of Na and K with our bilayer data, and performing a least-squares analysis, yields values of the electron-spin susceptibility of Li, Cu, and Ag. The resulting values are (2.29\ifmmode\pm\else\textpm\fi{}0.13)\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}6}$ cgs volume units for lithium, (1.35\ifmmode\pm\else\textpm\fi{}0.06)\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}6}$ cgs volume units for copper, and (0.86\ifmmode\pm\else\textpm\fi{}0.04)\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}6}$ cgs volume units for silver. These values agree with theoretical estimates and other experimental determinations. The self-consistency of our results also supports the reliability of our technique. This technique is potentially applicable to all metals for which CESR can be observed, and we discuss some possible candidates for future bilayer CESR susceptibility measurements.
6 citations
TL;DR: In this paper, the authors proposed that self-formed superconducting quantum-interference device (SQUID) structures on the surface of a superconductor are the dominant nonlinearity for the observed third-harmonic fields.
Abstract: Third-harmonic generation (35 GHz) at the surface of a superconductor was investigated. The observed periodic modulation of third-harmonic power with applied dc field implies a fluxquantization dependence which is not contained in the Entin-Wohlman theory of the intrinsic nonlinear response. We propose that self-formed superconducting quantum-interference device (SQUID) structures on the surface are the dominant nonlinearity for our samples. Computer simulation of a SQUID model reveals a striking similarity to the dc field, input power, and temperature dependence of the observed third-harmonic fields.
4 citations