Development of nano hall sensors for high resolution scanning hall probe microscopy

Ankara : The Department of Physics and the Institute of Engineering and Science of Bilkent Univ., 2008.Thesis (Ph.D.) -- Bilkent University, 2008.Includes bibliographical references leaves 171-179.Dede, MünirPh.D

Investigation of the magnetic properties of BSCCO superconductors with scanning Hall probe microscope

Cataloged from PDF version of article.A low temperature scanning Hall probe microscope (LT-SHPM) with low noise GaAs/AlGaAs 2DEG Hall probes is used to investigate the magnetic properties of a Ag-sheathed BSCCO-2223 tape and a single crystal BSCCO-2212 superconductor. The Hall probes are micro fabricated with 1 µm wide Hall bars which have ∼0.85 µm electrical width. The magnetization behavior, vortex structures and the vortex lattice melting are observed at 77 K. Flux penetration into the BSCCO-2212 single crystal is also observed and imaged with single vortex resolution.Dede, MünirM.S

Yüksek sıcaklık üstün iletkenlerinde vorteks yapılarının taramalı Hall aygıtı mikroskobu (THAM) ile incelenmesi

TÜBİTAK TBAG Proje01.08.2001BSCCO tek kristal (2212) üstüniletke ve BSCCO/gümüş tel üstüniletkeninde vorteks yapıları taramalı Hall aygıtı mikroskobu ile incelenmiştir. Ayrıca oda sıcaklığında üstün performans gösteren InSb Hall sesörleri ve atomik kuvvet mikroskobu ile tümleştirilmiş Hall aygıtları geliştirilmiştir

An Ultra-Low Temperature Scanning Hall Probe Microscope For Magnetic Imaging Below 40 Mk

We describe the design of a low temperature scanning Hall probe microscope (SHPM) for a dilution refrigerator system. A detachable SHPM head with 25.4 mm OD and 200 mm length is integrated at the end of the mixing chamber base plate of the dilution refrigerator insert (Oxford Instruments, Kelvinox MX-400) by means of a dedicated docking station. It is also possible to use this detachable SHPM head with a variable temperature insert (VTI) for 2 K-300 K operations. A microfabricated 1 mu m size Hall sensor (GaAs/AlGaAs) with integrated scanning tunneling microscopy tip was used for magnetic imaging. The field sensitivity of the Hall sensor was better than 1 mG/root Hz at 1 kHz bandwidth at 4 K. Both the domain structure and topography of LiHoF4, which is a transverse-field Ising model ferromagnet which orders below T-C = 1.53 K, were imaged simultaneously below 40 mK. (C) 2014 AIP Publishing LLC.Wo