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【答案】应助回帖
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超级老快: 金币+100, 翻译EPI+1, ★★★很有帮助 2018-04-20 18:58:57
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Differences of electron structures between Eu2+ to Eu3+ exist: the Eu2+ ion has a paramagnetic property (4f7, S = 7/2, L = 0, J = 7/2), while the Eu3+ ion does not (4f6, S = 3, L = 3, J = 0) [1-2]. Since ESR can be seen that whether there exist or concentrate Eu2+ paramagnetic ions, ESR spectra were used to observe the Eu2+ ion concentration of before and after heat treated process. As shown in Figure S2, the ESR spectra show that Eu2+ concentration increases due to the reduction effect by remanent low valance of Al elements during heat treated at air atmosphere. It has proved that Eu2+ PL intensity enhanced with heating caused by volume concentration of Eu2+ increased in glass phase. |
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