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Observation of quantized vortices by cryocooler-based scanning Hall probe microscope

✍ Scribed by Y. Tokunaga; Y. Konishi; M. Tokunaga; T. Tamegai

Publisher: Elsevier Science
Year: 2004
Tongue: English
Weight: 320 KB
Volume: 412-414
Category: Article
ISSN: 0921-4534
DOI: 10.1016/j.physc.2003.12.054

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✦ Synopsis

We have developed a scanning Hall probe microscope (SHPM) system utilizing closed-cycle cryocooler. The Hall probe used in this system is fabricated from a GaAs/GaAlAs two-dimensional electron gas. A stepping-motor-driven XYZ translator is used with a resolution better than 0.1 lm and maximum scan range of 20 • 20 mm 2 . The spatial resolution of the system is about 5 lm and magnetic resolution is about 100 mG. By using this system, we have successfully resolved the quantized vortices on the cleaved surface of Bi 2 Sr 2 CaCu 2 O 8þy single crystal.

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