Lead Free Congruent LiNbO3 LNC Single Crystals With Large ME Effects
Lead-Free Congruent LiNbO3 (LNC) Single Crystals With Large ME Effects
Recently, we have shown the possibility to produce large ME effects in composites containing lead-free congruent LiNbO3 (LNC) single crystals. Furthermore, some new promising techniques have been developed to directly engineer two ferroelectric domains with antiparallel spontaneous polarization vectors in a single crystal plate (bidomain).
In previous studies, we proposed the use of square or long bar metglas/PE bi-layered composites with Y128-cut LNC single-crystal “head-to-head” (H–H) and “tail-to-tail” (T–T) bidomains in sensitive magnetic field sensors. The anisotropy of single-crystalline LNC can be used to achieve a high direction-dependent sensitivity to magnetic fields at low frequencies. Choosing a crystal with an appropriate cut is a very important step in the development of the ME sensors.
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Material |
4inch 6inch 8inch LiNbO3 LNC wafer |
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Orientation |
Z-cut or Y128°-cut |
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Surface finish |
Single or Double sides polish (DLP/SLP/ SSP/DSP all available ) |
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Thickness |
0.35mm, 0.50mm, 1.00mm |
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TTV |
< 5µm |
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BOW |
± 30um |
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Warp |
< 40µm |
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Orientation flats |
Semi Standard Notch |
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Polished side Ra |
Roughness Ra<10A |
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Back Side Criteria |
Roughness Ra:0.5-1.0µm GC#1000 |
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Edge Rounding |
Compliant with SEMI M1.2 Standard/refer to IEC62276 |
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Crystal Sturucture |
Trigonal, Space group R3c, Point group 3m |
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Melting Point |
1253℃ |
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Mohs Hardness |
5 |
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Density |
4.64g/cm3 |
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Deliquescence |
None |
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Optical Homogeneity |
~5x10-5/cm |
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Transparency Range |
420-5200nm |
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Absorption Coefficient |
~0.1%/cm @1064nm |
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Refractive Indices @1064nm |
ne=2.146, no=2.220@1300nm ne=2.156, no=2.232@1064nm ne=2.203, no=2.286@632.8nm |
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Thermal Expansion Coefficients (at 25℃ ) |
//a,2.0x10-6/K //a,2.2x10-6/K |
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Thermal Conductivity Coefficients |
38 W/m/K at 25℃ |
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Thermal Optical Coefficients |
dno/dT=-0.874 x 10-6/K at 1.4μm dne/dT=39.073 x 10-6/K at 1.4μm |
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The Sellmeier Equations (λ in μm) |
no2=4.9048+0.11768/(λ2-0.04750)-0.027169λ2 ne2=4.5820+0.099169/(λ2-0.04443)-0.02195λ2 |
Acceptance Check
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