Part 2 GMI/GMR Giant Magnetoimpedance/ Magnetoresistance in - PowerPoint PPT Presentation

Part 2

GMI/GMR – Giant Magnetoimpedance/ Magnetoresistance in magnetic nanostructures Δ Z/Z , f=120GHz ΔR/R AFM 2H m 1.0 1.0 M 2H j NM M 0.5 FM 0.5 M NM 0 0 M - 1000 + 1000 +1000 - 1000 Magn. field, Oe Magn. field, Oe Types of nanostructures for study in dept Granular structures Microwires Multilayered structures M core NM wire ~5 0D-structure 1D-structure 2D-structure List of relevant papers see in appendix please

Vector Network Analyzer Agilent NA5230A as a component of Radiospectroscopy complexes for researches at f = 50 MHz – 40 GHz Waveguide-coaxial adopters 10-40GHz NA with Giant Magnetoimpedance cell NA with Open Resonator research unit

19 1D magnetotunable metamaterials design in IRE

Magnetophotonics. Ferrite Based 1D photonic crystals Ferrite MPC in “quasi” -ambient space 0 kOe 1,0 5 kOe T , a.u. 0,5 0,0 30 40 50 60 70 80 f , GHz EXPERIMENTAL SETUP Metal-dielectric waveguide MPC in horn waveguide Ferrite MPC in waveguide 40 1 fedge , GHz 2 3 36 magnet simulation poles experiment 32 0 2 H , kOe 4 6

Experiment. Field distribution in the MagnetoPhotonic Crystals (MPC) Pass band 1,0 Field density, a.u. f = 37 GHz Passive |S21|2, a.u. probe 0,5 0,0 0 10 20 30 40 50 60 Distance, a.u. distance , a.u. Stop band 1,0 Field density, a.u. f = 32 GHz 0,8 Distance, a.u. Mirror-reflected MPC 0,6 MPC 2 , a.u. For Stop-band |S 21 | 0,4 0,2 0,0 0 100 200 300 400 500 600 X, a.u Distance, a.u. airgap quartz ferrite Active probe

Т amm state in magnetophotonic crystal + wire medium j k d MPC+WM m ( m e B ) 21 2 11 k 0 j k d x m e m B 22 2 12 “Tamm” peak position depends on H-field applied!!! Stop band edge Transmission, a.u. MPC+TWS TWS MPC Tamm peak 0,18 transmitting 0,008 transmitting 25 30 35 40 45 50 Frequency, GHz 0,006 Q>1000 0,09 0,004 0,002 0,000 0,00 2,20E+010 2,25E+010 2,30E+010 2,35E+010 2,10E+010 2,80E+010 3,50E+010 4,20 Frequency, Hz frequency frequency Frequency, Hz