Bismuth nano-Hall probes fabricated by focused ion beam milling for direct magnetic imaging by room temperature scanning Hall probe microscopy

Oral, Ahmet
Bismuth nano-Hall probes with dimensions similar to 120 x 120 nm were fabricated by focused ion beam milling and used for the direct room temperature magnetic imaging of crystalline garnet thin films and strontium ferrite permanent magnets by scanning Hall probe microscopy. At driving currents of 40 muA, the Hall coefficient and magnetic field sensitivity of the Bi nano-Hall probes were 3.3 x 10(-4) CYG and 7.2 G/root Hz, respectively.


Room-temperature scanning Hall probe microscope (RT-SHPM) imaging of garnet films using new high-performance InSb sensors
Oral, Ahmet; DEDE, M; MASUDA, H; OKAMOTO, A; SHİBASAKİ, I; SANDHU, A (Institute of Electrical and Electronics Engineers (IEEE), 2002-09-01)
High-performance InSb micro-HaIl sensors were fabricated by optical lithography and incorporated in a room-temperature scanning Hall probe microscope for imaging of localized magnetic fluctuations in close proximity to the surfaces of crystalline uniaxial garnet films. The room-temperature noise figure of the InSb sensors was 6-10 mG/v/Hz, which is an order of magnitude better than GaAs-AlGaAs two-dimensional electron gas sensors used to date.
Zigzag metallic conductors as frequency selective surfaces
DELİHACIOĞLU, KEMAL; Sabah, Cumali; KARAASLAN, MUHARREM; ÜNAL, EMİN (Institution of Engineering and Technology (IET), 2013-06-18)
Reflection and transmission properties of a new type of frequency selective surface (FSS) made of zigzag metallic elements placed periodically on a dielectric substrate are investigated theoretically for arbitrary polarisation. The electric field integral equation technique with the subdomain overlapping piecewise sinusoidal basis functions are employed to compute the unknown current coefficients induced on the metallic elements. The zigzag FSS arrays act as a low-pass filter in S-(1-5 GHz), X-(8-12 GHz) an...
U-shaped frequency selective surfaces for single- and dual-band applications together with absorber and sensor configurations
Bakir, Mehmet; DELİHACIOĞLU, KEMAL; KARAASLAN, MUHARREM; Dincer, Furkan; Sabah, Cumali (Institution of Engineering and Technology (IET), 2016-02-19)
In this study, the frequency selective surface (FSS), absorbance and sensing applications of new unit cells comprised of single, double and quad U-shaped metallic elements are numerically and experimentally investigated. The numerical results are realised by using finite integration technique-based electromagnetic simulation software, CST Microwave Studio. Experimental results are obtained by means of Agilent N5234A PNA-L vector network analyser. The simulated and measured results of U-shaped FSSs are carri...
Metamaterial absorber-based sensor embedded into X-band waveguide
SABAH, CUMALİ; TURKMEN-KUCUKSARİ, OZNUR; Sayan, Gönül (Institution of Engineering and Technology (IET), 2014-07-17)
A novel metamaterial sensor, integrated with an X-band waveguide, is proposed for high-resolution measurements of variations in the dielectric constant and/or the thickness of a superstrate layer that covers a pair of absorber unit cells. Variations in superstrate parameters are potentially caused by physical, chemical or biological factors, and can be detected by measuring the corresponding shifts in the resonance frequency of the metamaterial sensor. It is estimated by simulation results that resolution l...
Single loop resonator: dual-band magnetic metamaterial structure
EKMEKÇİ, EVREN; Sayan, Gönül (Institution of Engineering and Technology (IET), 2010-03-04)
A novel sub-wavelength metamaterial structure, called a single loop resonator, is presented, providing two separate magnetic resonance frequencies in addition to an electric resonance in the microwave region. Transmission and reflection characteristics of the proposed topology are simulated using both Ansoft HFSS software and CST Microwave Studio software for the verification of numerical results. Effective medium parameters of this metamaterial structure are also extracted to demonstrate the presence of tw...
Citation Formats
A. SANDHU, H. MASUDA, K. KUROSAWA, A. Oral, and S. BENDİNG, “Bismuth nano-Hall probes fabricated by focused ion beam milling for direct magnetic imaging by room temperature scanning Hall probe microscopy,” ELECTRONICS LETTERS, pp. 1335–1336, 2001, Accessed: 00, 2020. [Online]. Available: