Fast, Sensitive Magnetic-Field Sensors Based on the Faraday Effect in YIG
نویسندگان
چکیده
We characterize magnetic-field sensors based on the Faraday effect in ferrimagnetic iron garnets in terms of their sensitivity, speed, and directionality. Signal-to-noise measurements at 80 Hz on small (typically 5 mm diameter x 3 mm long) samples of yttrium iron garnet (YIG) yield noise equivalent magnetic fields of 10 nT /.JHz. Frequen~y response measurements exhibit virtually flat response to approximately 700 MHz. ,_ ..
منابع مشابه
Recent Advances of Wide Band Magneto-optical Modulators in Advanced High Speed Optical Communication System
The technology involves a new type of compact device based on magneto-optics in a fiber micro modulator. This type of modulator allows the user to inter manipulate and control the propagation of the incoming light. The operation mechanism uses external magnetic field to manipulate Fe micro particle in order to cause modulation of an optical signal that propagates along an optical waveguide. Thi...
متن کاملتهیهی نانوذرات گارنت ایتریوم آهن (YIG) به روش سل-ژل و بررسی ویژگیهای مغناطیسی آن
In this work yttrium iron garnet (Y3Fe5O12 or YIG) nanoparticles have been prepared by sol-gel method, raw materials were dissolved in citric acid and warmed up and stirred to form a gel. Synthesized nanoparticles were characterized, using X-ray diffraction (XRD), FT-IR and TG-DTA methods. Magnetic properties of the nanoparticles were measured, using vibrating sample magnetometer (VSM) and Fara...
متن کاملPARTICULATE FILMS FOR MAGNETO·OPTICAL RECORDING I. THEORY OF THE MAGNETO·OPTICAL EFFECT M. ABE and M. GOMI
For magneto-optical(MO) recording media we propose particulate films with magnetic fine particles dispersed in binders. Using effective dielectric tensor Faraday rotation ~ and absorption coefficient -a-are calculated for the particulate films containing Bi-substituted YIG and Co fine particles. The MO figure of merit O'~ of the particulate films exceeds that of continuous magnetic films. This ...
متن کاملTemperature and high magnetic field dependence of the Faraday rotation in the terbium iron garnet
The Faraday rotation of terbium iron garnet at 1.15 03BC wavelength is presented. The experimental results have been obtained along the [111] easy direction both in low d.c. field 20 kOe as a function of temperature between 4.2 and 300 K and at room temperature as a function of the applied field (up to 1 200 kOe). The results are analysed in terms of magnetic and electric dipole contributions f...
متن کاملMagnetic Field Sensors And Visualizers Using Magnetic Photonic Crystals
Magneto-optical imaging is widely used to observe the domain patterns in magnetic materials, visualize defects in ferromagnetic objects, and measure the spatial distribution of stray magnetic fields. Optimized 1D magneto-photonic crystals enable a significant increase in the sensitivity of magneto-optical sensors. The properties of such devices based on the optimized reflection (doubled Faraday...
متن کامل