High-sensitivity vibrating reed studies of superconductors

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

doi:10.1016/0921-4526(96)00029-4

High-sensitivity vibrating reed studies of superconductors

L. De Long, J. Childers, A. Olinger, Q. Chen, J. C. Hou, U. Lahaise, J. Zhang, D. G. Hinks, P. Canfield, R. Schweinfurth, D. Van Harlingen, M. Norton

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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 H_c2. VR data for thin film, crystalline and ceramic (Ba_0.6K_0.4)BiO₃ samples demonstrate the sensitivity of the VR to microstructure and inhomogeneities, and a study of HoNi₂B₂C 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_c2 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.

Original language	English (US)
Pages (from-to)	22-27
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	223-224
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4526(96)00029-4
State	Published - Jun 2 1996

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/0921-4526(96)00029-4

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title = "High-sensitivity vibrating reed studies of superconductors",

abstract = "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 Hc2. VR data for thin film, crystalline and ceramic (Ba0.6K0.4)BiO3 samples demonstrate the sensitivity of the VR to microstructure and inhomogeneities, and a study of HoNi2B2C 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 Hc2 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.",

author = "{De Long}, L. and J. Childers and A. Olinger and Q. Chen and Hou, {J. C.} and U. Lahaise and J. Zhang and Hinks, {D. G.} and P. Canfield and R. Schweinfurth and {Van Harlingen}, D. and M. Norton",

note = "Funding Information: Research at U. Kentucky was supported by US NSF Grant EHR-9108764, at U. Illinois by US NSF STC Grant DMR-9120000, at Ames Laboratory by DoE DER/OBS Contract W-7405-Eng-82, and at Argonne by US DoE BES Contract W-31-109-ENG-38. We thank Mr. N. Dilley, Dr. A. Huxley, Dr. J.W. Lynn, Prof. M.B. Maple, Dr. S.B. Roy, and Prof. S. Sridhar for useful discussions.",

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doi = "10.1016/0921-4526(96)00029-4",

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AU - De Long, L.

AU - Childers, J.

AU - Olinger, A.

AU - Chen, Q.

AU - Hou, J. C.

AU - Lahaise, U.

AU - Zhang, J.

AU - Hinks, D. G.

AU - Canfield, P.

AU - Schweinfurth, R.

AU - Van Harlingen, D.

AU - Norton, M.

N1 - Funding Information: Research at U. Kentucky was supported by US NSF Grant EHR-9108764, at U. Illinois by US NSF STC Grant DMR-9120000, at Ames Laboratory by DoE DER/OBS Contract W-7405-Eng-82, and at Argonne by US DoE BES Contract W-31-109-ENG-38. We thank Mr. N. Dilley, Dr. A. Huxley, Dr. J.W. Lynn, Prof. M.B. Maple, Dr. S.B. Roy, and Prof. S. Sridhar for useful discussions.

PY - 1996/6/2

Y1 - 1996/6/2

N2 - 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 Hc2. VR data for thin film, crystalline and ceramic (Ba0.6K0.4)BiO3 samples demonstrate the sensitivity of the VR to microstructure and inhomogeneities, and a study of HoNi2B2C 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 Hc2 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.

AB - 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 Hc2. VR data for thin film, crystalline and ceramic (Ba0.6K0.4)BiO3 samples demonstrate the sensitivity of the VR to microstructure and inhomogeneities, and a study of HoNi2B2C 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 Hc2 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.

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High-sensitivity vibrating reed studies of superconductors

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