Growth and Faraday rotation characteristics of TbVO4 crystals

Effect of B2O3 Content and Microstructure on Verdet Constant of Tb2O3-Doped GBSG Magneto-Optical Glass

“…It is believed that the vibration of B–O bonds stretching of the [BO 4 ] units appears between 800 and 1200 cm –1 , which can correspond to the peak at 980 cm –1 in Figure ; and the peaks at 1200–1600 cm –1 belong to the asymmetric stretching relaxation of the B–O bands of triangles [BO 3 ] units, which can correspond to the peak at 1210 and 1420 cm –1 in Figure . The peak at 1210 cm –1 is the characteristic peak of B 3 O 6 . − Also, the peaks at 520 and 710 cm –1 are the deformation modes of the glass network, and in particular, the peak at 710 cm –1 belongs to the bond-bending motion of B–O–B groups.…”

“…Verdet constant is a parameter that characterizes the MO performance of a MO material. The Verdet constant of MO glass is generally lower than that of MO crystals, 12 so it is very important to master the method of increasing the Verdet constant of MO glass effectively, but this is not an easy task for MO glass. Currently, there are two main methods that are widely used to improve the Verdet constant of MO glasses.…”

Design, Growth, and Characterization of High Verdet Constant Magneto-Optical Crystal in Cubic Oxide System Tb2O3/Y2O3/ZrO2 Crystal with Enhanced Laser-Induced Damage Threshold

“…Therefore, the evaluation method for M-O crystals should be updated urgently. Based on the Faraday effect, the Verdet constant V is divided into wave contribution V 1 and transition contribution V h , , which can generally be theoretically computed, where the parameter E , further consisting of the number of Tb 3+ ions per unit volume N , effective transition probability C 0 , and effective transition wavelength λ 0 , are critical factors. , Hence, the summary parameters for different M-O oxide crystals are shown in Table . − ,− It can be seen that the TAG crystal has an N value of 1.36 × 10 22 cm –3 , which is larger than those of TAGG (1.33 × 10 22 cm –3 ), TSAG (1.27 × 10 22 cm –3 ), TSLAG (1.27 × 10 22 cm –3 ), and TGG (1.27 × 10 22 cm –3 ). The corresponding Verdet constant of TAG is as follows: (174 rad·m –1 ·T –1 ) > TAGG (163 rad·m –1 ·T –1 ) > TSAG (152 rad·m –1 ·T –1 ) > TSLAG (146 rad·m –1 ·T –1 ), and TGG (142 rad·m –1 ·T –1 ). − , BTP has a smaller N value of 0.35 × 10 22 cm –3 , resulting in the Verdet constant being only 47 rad·m –1 ·T –1 .…”

“…NTM, LTM, and TbVO 4 crystals have N values of 1.29 × 10 22 , 1.31 × 10 22 , and 1.23 × 10 22 cm –3 , respectively, but they have a large E of 6.11–8.18 × 10 7 nm 2 ·rad·m –1 ·T –1 compared with that of the TGG (4.26 × 10 7 nm 2 ·rad·m –1 ·T –1 ). Therefore, they have large Verdet constants of 216, 246, and 195 rad·m –1 ·T –1 , respectively. − Similarly, the STS has a large N value of 1.50 × 10 22 cm –3 and a suitable E of 7.56 × 10 7 nm 2 ·rad·m –1 ·T –1 , leading to the high Verdet constant of 227 rad·m –1 ·T –1 . Among them, the Tb 2 O 3 crystal has the largest N value of 2.59 × 10 22 cm –3 and an extremely high Verdet constant of 476 rad·m –1 ·T –1 .…”

“…Nowadays, the screening of M-O crystals mainly concentrates on those known laser crystals and nonlinear optical crystals designed with Tb 3+ ion substitution. Many Tb 3+ -containing M-O crystals have been identified, such as TAG (Tb 3 Al 5 O 12 ), TAGG (Tb 3 Al 3 Ga 2 O 12 ), TSAG (Tb 3 Sc 2 Al 3 O 12 ), TSLAG (Tb 3 (Sc 1.95 Lu 0.05 Al 3 )­O 12 ), BTP (Ba 3 Tb­(PO 4 ) 3 ), TZO (Tb 2 Zr 2 O 7 ), TbYO 3 , Tb 2 O 3 , TbVO 4 , NTM (Na 2 Tb 4 (MoO 4 ) 7 ), LTM (Li 2 Tb 4 (MoO 4 ) 7 ), STB (Sr 3 Tb­(BO 3 ) 3 ), TSiO (Tb 9.33 (SiO 4 ) 6 O 2 ), and STS (Sr 2 Tb 8 (SiO 4 ) 6 O 2 ) . To assess the M-O property of the crystal, the Verdet constant, as the most significant factor, should be acquired, which is usually measured through a millimeter-sized single crystal.…”