Spectroscopic properties of Nd_0.5Gd_0.5Fe₃(BO₃)₄ single crystal

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• 作者：A.V. Malakhovskii ; ^{malakha@iph.krasn.ru} ; A.L. Sukhachev ; A.A. Leont&rsquo ; ev ; I.A. Gudim ; A.S. Krylov ; A.S. Aleksandrovsky
• 关键词：78.20.&minus ; e ; 78.40.Ha ; 75.50.Ee
• 刊名：Journal of Alloys and Compounds
• 出版年：2012
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：15 July, 2012
• 卷：529
• 期：Complete
• 页码：38-43
• 文件大小：535 K

摘要

The polarized absorption spectra of trigonal single crystal Nd_0.5Gd_0.5Fe₃(BO₃)₄ were measured in the spectral range 10,000-22,000 cm^鈭?. 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: 惟₂ = 4.4 脳 10^鈭?0 cm², 惟₄ = 8.04 脳 10^鈭?0 cm², and 惟₆ = 8.25 脳 10^鈭?0 cm². The strengths, spontaneous emission probabilities, branching ratios, spectroscopic quality factor and excited state lifetime were calculated for transitions from the ⁴F_3/2 state to ⁴I_J manifold. All the obtained spectroscopic characteristics were compared with those of alumoborates with the same crystal structure.