EPR Spectra of Cr~(3+)-Doped LuNbO_4 Crystals

A. G. Beda; A. A. Bush; A. F. Volkov; V. F. Meshcheryakov

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EPR Spectra of Cr~(3+)-Doped LuNbO_4 Crystals

机译：Cr〜（3+）掺杂LuNbO_4晶体的EPR谱

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Ferroelastic LuNbO_4 single crystals containing 0.3 at.% Cr~(3+) ions have been grown by the floating zone technique, and their EPR spectra have been studied at a frequency of 9.8 GHz at room temperature. The lines on the spectra are due to the transitions caused by three paramagnetic centers formed as a result of the replacement of one isovalent position of a Lu~(3+) ion and two nonisovalent positions of Nb~(5+)-ions by Cr~(3+)-ions. As a result of twinning, the line number is doubled and four principal directions arise along which the same spectra are obtained. The spectra of these centers were described by a spin Hamiltonian with S = 3/2, the D and E parameters ranging from 0.024 to 0.17 cm~(-1), and the g-factors g_(||) = 1.75-2.20 and g_⊥ = 1.90-2.13.

机译：通过浮区技术生长了含有0.3at。％Cr〜（3+）离子的铁弹性LuNbO_4单晶，并在室温下以9.8 GHz的频率研究了它们的EPR光谱。光谱中的线是由于三个顺磁中心的跃迁而形成的，该三个顺磁中心是由Cr代替Lu〜（3+）离子的一个等价位置和Nb〜（5+）离子的两个非等价位置而形成的〜（3+）离子。作为孪生的结果，线数加倍并且出现四个主要方向，沿着这些主要方向获得相同的光谱。这些中心的光谱用自旋哈密顿量描述，S = 3/2，D和E参数范围为0.024至0.17 cm〜（-1），g因子g_（||）= 1.75-2.20和g_⊥= 1.90-2.13。

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《Crystallography reports》 |2002年第2期|共4页
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A. G. Beda; A. A. Bush; A. F. Volkov; V. F. Meshcheryakov;
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机译：Cr〜（3+）掺杂LuNbO_4晶体的EPR谱
2. EPR study of chromium-doped forsterite crystals: Cr ~(3+)(M1) with associated trivalent ions Al ~(3+) and Sc ~(3+) [J] . Ryabov I.D. Physics and chemistry of minerals . 2012,第9期

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EPR Spectra of Cr~(3+)-Doped LuNbO_4 Crystals

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