Spectroscopic properties of Nd0.5Gd0.5Fe3(BO3)4 single crystal

• Published in: Journal of alloys and compounds 2012-07, Vol.529, p.38-43
• Main Authors: Malakhovskii, A.V., Sukhachev, A.L., Leont’ev, A.A., Gudim, I.A., Krylov, A.S., Aleksandrovsky, A.S.
• Format: Article
• Language: English
• Subjects: Alloys; Crystal structure; Excitation spectra; Magnetically ordered materials; Mathematical analysis; Optical properties; Rare earth alloys and compounds; Single crystals; Spectra; Spectroscopy; Spontaneous emission; Transition metal alloys and compounds
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2012.03.066

► d–d and f–f transitions spectra of Nd0.5Gd0.5Fe3(BO3)4 were obtained separately. ► Judd–Ofelt parameters of f–f transitions were found in a ferroborate for the first time. ► Spectroscopic characteristics of the laser transitions were obtained. ► Spectroscopic quality of the ferroborate is better than of isostructural alumoborate. ► Doubly-forbidden d–d transitions and f–f transitions have similar intensities. The polarized absorption spectra of trigonal single crystal Nd0.5Gd0.5Fe3(BO3)4 were measured in the spectral range 10,000–22,000cm−1. The d–d and f–f transitions spectra were separated. The f–f transitions intensities were analyzed in terms of the Judd–Ofelt theory in a ferroborate with huntite structure for the first time, and the following parameters of the theory were obtained: Ω2=4.4×10−20cm2, Ω4=8.04×10−20cm2, and Ω6=8.25×10−20cm2. The strengths, spontaneous emission probabilities, branching ratios, spectroscopic quality factor and excited state lifetime were calculated for transitions from the 4F3/2 state to 4IJ manifold. All the obtained spectroscopic characteristics were compared with those of alumoborates with the same crystal structure.