High-sensitivity vibrating reed studies of superconductors

✍ Scribed by L De Long; J Childers; A Olinger Jr.; Q Chen; J.-C Hou; U Lahaise; J Zhang; D.G Hinks; P Canfield; R Schweinfurth; D Van Harlingen; M Norton

• Book ID: 103941497
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 496 KB
• Volume: 223-224
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(96)00029-4

✦ Synopsis

Recent improvements in the vibrating reed (VR) technique permit precision studies of the mixed state of complex superconducting materials far below the upper critical magnetic field Hcz. VR data for thin film, crystalline and ceramic (Bao.6Ko.4)BiO3 samples demonstrate the sensitivity of the VR to microstructure and inhomogeneities, and a study of HoNi2BzC reveals previously inaccessible vortex dynamical anomalies and minute details of a complex phase competition between magnetism and reentrant superconductivity. CeRu2 VR data are reversible near H~z where giant hysteresis is observed in DC magnetization data, but are hysteretic over an extended region at lower temperatures and fields, indicating vortex dynamics must be considered in testing the existence of unconventional pairing states proposed for this system.