High-resolution scanning Hall probe microscopy

Hans D. Hallen; H. F. Hess; A. M. Chang; Loren N. Pfeiffer; Kenneth W. West; David B. Mitzi

doi:10.1117/12.146371

4 June 1993 High-resolution scanning Hall probe microscopy

Hans D. Hallen, H. F. Hess, A. M. Chang, Loren N. Pfeiffer, Kenneth W. West, David B. Mitzi

Proceedings Volume 1855, Scanning Probe Microscopies II; (1993) https://doi.org/10.1117/12.146371
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

A high resolution scanning Hall probe microscope is used to spatially resolve vortices in high temperature superconducting Bi₂Sr₂CaCu₂O_8+(delta) crystals. We observe a partially ordered vortex lattice at several different applied magnetic fields and temperatures. At higher temperatures, a limited amount of vortex re-arrangement is observed, but most vortices remain fixed for periods long compared to the imaging time of several hours even at temperatures as high as 75 degree(s)K (the superconducting transition temperature for these crystals is approximately 84 degree(s)K). A measure of these local magnetic penetration depth can be obtained from a fit to the surface field of several neighboring vortices, and has been measured as a function of temperature. In particular, we have measured the zero temperature penetration depth and found it to be 275 +/- 40 nm.

Citation Download Citation

Hans D. Hallen, H. F. Hess, A. M. Chang, Loren N. Pfeiffer, Kenneth W. West, and David B. Mitzi "High-resolution scanning Hall probe microscopy", Proc. SPIE 1855, Scanning Probe Microscopies II, (4 June 1993); https://doi.org/10.1117/12.146371

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