Abstract
Dilatometric and magnetic studies on single crystals of the high-κ superconductors UPd2Al3 and CeRu2 reveal a spontaneous increase of the volume-pinning force at high magnetic fields of more than one order of magnitude. This “anomalous peak effect” was claimed to be a signature of a new staggered high-field superconducting order parameter. We will review the recent developments and discuss alternative explantations.
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Modler, R. “Anomalous peak effect”—Is it indicative of a generalized Fulde-Ferrell-Larkin-Ovchinnikov state?. Czech J Phys 46 (Suppl 6), 3123–3130 (1996). https://doi.org/10.1007/BF02548119
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DOI: https://doi.org/10.1007/BF02548119