scholarly journals The Magnetic Microstructure of YIG / GGG Films: Mossbauer Studies in the External Magnetic Fields

2019 ◽  
Vol 20 (2) ◽  
pp. 202-208
Author(s):  
А.О. Kotsyubynsky ◽  
V.V. Moklyak ◽  
І.М. Fodchuk
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Gadolinium Gallium Garnet ◽  
Yttrium Iron ◽  
Magnetic Microstructure ◽  
Mössbauer Studies ◽  
Structure Changes ◽  
Magnetic Field Increase ◽  
Iron Garnet ◽  
Applied External Magnetic Field

The Mossbauer studies of yttrium iron garnet (YIG) films grown on the gadolinium gallium garnet (GGG) substrate was realized for different films thickness (2.85 and 5.42 mm) at the applied external magnetic field. It is shown that the main changes in the magnetic microstructure of YIG/GGG films are occurred at magnetic field value up to 2.20 kOe. The changes of the hyperfine magnetic fields on the iron nuclei have been investigated and its isotropic component was analyzed. It was determined that the domain structure changes (in particular, the domains width enlarging) under the applied magnetic field increase with the film thickness decreasing.

Flux-gate magnetic field sensor based on yttrium iron garnet films for magnetocardiography investigations

2016 ◽  
Vol 42 (8) ◽  
pp. 860-864 ◽  
Author(s):  
P. M. Vetoshko ◽  
N. A. Gusev ◽  
D. A. Chepurnova ◽  
E. V. Samoilova ◽  
I. I. Syvorotka ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Yttrium Iron Garnet ◽  
Magnetic Field Sensor ◽  
Yttrium Iron ◽  
Garnet Films ◽  
Field Sensor ◽  
Flux Gate ◽  
Iron Garnet

Optical waveguide switch through magnetic reflectance wall

2016 ◽  
Vol 30 (19) ◽  
pp. 1650119
Author(s):  
Yuntuan Fang ◽  
Zhiyao Ni ◽  
Lixia Yang
Keyword(s):  
Magnetic Field ◽  
Optical Waveguide ◽  
Mode Analysis ◽  
Photonic Crystal Waveguide ◽  
Frequency Range ◽  
Yttrium Iron ◽  
Iron Garnet ◽  
Rod Array ◽  
Two Sides ◽  
The Magnetic Field

We propose a new design to achieve optical waveguide switch. We construct a photonic crystal waveguide with one yttrium iron garnet (YIG) rod array on the two sides of the waveguide. Through the mode analysis, we find in special frequency range a few YIG rods under magnetic field can form the magnetic reflectance wall that blocks the light flow. Removing the magnetic field will delete the reflection wall and let the blocked light to be switched on.

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