| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1789991 | Journal of Crystal Growth | 2015 | 5 Pages |
•Na2Tb4(MoO4)7 crystals were grown by the Czochralski method.•The magnetic property was characterized by magnetic susceptibility from 2 to 300 K.•Na2Tb4(MoO4)7 shows a high transparency from 600 nm to 1500 nm.•The Verdet constant of Na2Tb4(MoO4)7 is about 1.6 times as large as that of Tb3Ga5O12.
Na2Tb4(MoO4)7 crystals have been grown by the Czochralski technique for the first time for magneto-optical applications. Structure refinement of XRD data confirms that the compound crystallizes in the tetragonal system I41/a , with scheelite structure. The as-grown crystal exhibits moderate thermal stability and weak thermal expansion anisotropy (αc/αa≈1.08αc/αa≈1.08), and the hardness is about 4.7 Moh. Transmittance spectra indicated that the Na2Tb4(MoO4)7 crystal presents a high transparency from 600 nm to 1500 nm after annealing in O2 atmosphere at 973 K for 20 h. The Faraday effect and the temperature dependence of the magnetic susceptibility have been investigated, which demonstrate that the Na2Tb4(MoO4)7 crystal exhibits paramagnetic behavior over the experimental temperature-range 2–300 K and yields a Faraday rotation which is about 1.6 times as large as that of Tb3Ga5O12 crystal. Na2Tb4(MoO4)7 crystal is therefore a promising Faraday material in particular for new magneto-optical applications in the visible–near IR wavelength region.
