Abstract
The ESR of Gd in the superconducting phase of the type II superconductors CeRu2 and LaOs2 shows a shift for the field for resonance and inhomogeneous broadening of the lineshape. Both effects strongly depend on the three different microwave frequencies (resp. magnetic fields). The broadening of max. 800 G is attributed to a non resolved finestructure splitting. The local field distribution in vortex state of these type II superconductors is less than 100 G and is the main contribution for shift of the field for resonance. In addition ESR results of Gd and Eu doped into La are discussed forT >T c. The comparison of depression of the superconducting transition temperature and exchange spin-flip scattering rate determined from ESR shows a perfect agreement.
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Baberschke, K. Electron spin resonance in superconducting materials. Z Physik B 24, 53–63 (1976). https://doi.org/10.1007/BF01312873
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DOI: https://doi.org/10.1007/BF01312873