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arXiv · 0907.1800

Measurement of Conduction Electron Polarization Via the Pairing Resonance

Y. M. Xiong·P. W. Adams·G. Catelani
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Abstract

We show that the pairing resonance in the Pauli-limited normal state of ultra-thin superconducting Al films provides a spin-resolved probe of conduction electron polarization in thin magnetic films. A superconductor-insulator-ferromagnet tunneling junction is used to measure the density of states in supercritical parallel magnetic fields that are well beyond the Clogston-Chandresekhar limit, thus greatly extending the field range of the tunneling density of states technique. The applicability and limitations of using the pairing resonance as a spin probe are discussed.

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Y. M. Xiong, P. W. Adams, G. Catelani. 2009-07-10. Measurement of Conduction Electron Polarization Via the Pairing Resonance. https://doi.org/10.1103/physrevlett.103.067009

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