Nano-Torsional Resonator Torque Magnetometry

Abstract

Magnetic torque is used to actuate nano-torsional resonators, which are fabricated by focused-ion-beam milling of permalloy coated silicon nitride membranes. Optical interferometry is used to measure the mechanical response of two torsion modes at resonance, which is proportional to the magnetization vector of the nanomagnetic volume. By varying the bias magnetic field, the magnetic behavior can be measured with excellent sensitivity ($\approx 10^8{\mu }_B$) for single magnetic elements.

8 pages preprint, 4 figures, accepted to Appl. Phys. Letters

References in corpus (4)

• Near-field cavity optomechanics with nanomechanical oscillators
• High quality mechanical and optical properties of commercial silicon nitride membranes
• Nanomechanical Detection of Itinerant Electron Spin Flip
• Topological change of the Fermi surface in ternary iron-pnictides with reduced c/a ratio: A dHvA study of CaFe2P2

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