Title: Piezoresistive mechanical detector for magnetic resonance force microscopy
Authors: Volodine, Alexandre ×
Buntinx, D
Brems, Steven
Van Haesendonck, Christian #
Issue Date: Jun-2005
Publisher: American Institute of Physics
Series Title: Review of Scientific Instruments vol:76 issue:6 pages:1-5
Article number: 063705
Abstract: We describe the design and performance of a detection unit for magnetic resonance force microscopy (MRFM) based on commercially available piezoresistive cantilevers. The magnetic tip attached to the cantilever acts as a field gradient source. The adjustable microstrip-line radio-frequency (rf) circuit, which is placed above the cantilever, enables to use a wide range of frequencies between 2.3 and 4.3 GHz, and to fully benefit from a frequency sweep of the rf magnetic field. The integration of the necessary field gradient source and broadband microstrip-line rf excitation circuit into the MRFM detector allows us to investigate samples of arbitrary size and shape. The integrated system can also be operated as a conventional magnetic force microscope (MFM) detection unit. Performance of our mechanical detector is demonstrated with ferromagnetic resonance and MFM data obtained on CoO/Co exchange biased microstructures. Spatial variations of the MRFM signal, which are induced by a spatially modulated exchange bias, are monitored with a lateral resolution of about 5 mu m. (c) 2005 American Institute of Physics.
ISSN: 0034-6748
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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