DETERMINATION OF THE PIEZOSPECTROSCOPIC COEFFICIENTS FOR CHROMIUM-DOPED SAPPHIRE
DETERMINATION OF THE PIEZOSPECTROSCOPIC COEFFICIENTS FOR CHROMIUM-DOPED SAPPHIRE
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DOI：
10.1111/j.1151-2916.1995.tb08493.x
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发表时间：
1995-05-01
影响因子：
3.9
通讯作者：
CLARKE, DR
中科院分区：
文献类型：
--
作者：
HE, J;CLARKE, DR
通过直接测量沿三个主要晶体学方向的单轴压缩以及沿三个主要剪切方向加载时的频移，对0.05 wt%红宝石的压光谱张量系数进行了评估。尽管该张量的迹的数值与先前报道的相同，但沿c和m方向的压光谱系数略有不同。与蓝宝石绕c轴的旋转对称性所预期的相反，发现沿a方向的系数与沿m方向的不同，并且它沿a方向随应变呈非线性变化。这种差异归因于所施加的应力破坏了绕c轴的旋转对称性，并根据Cr³⁺离子相对于最近邻氧离子的相对运动进行了解释。另外一个发现是，R1和R2线的压光谱张量存在显著差异。这将有助于比以往更完整地从荧光测量中确定应力张量。
The coefficients of the piezospectroscopic tenser for a 0.05 wt% ruby are evaluated by direct measurement of the frequency shift for uniaxial compression along the three principal crystallographic directions and for loading in the three principal shear directions, Although the numerical value of the trace of the tenser is the same as previously reported, the piezospectroscopic coefficients along the c and m directions are slightly different, Contrary to expectation from the rotational symmetry of sapphire about the c axis, the coefficient along the a direction was found to be different from that along the m direction, It also varies nonlinearly with strain in the a direction, The difference is attributed to the applied stress breaking the rotational symmetry about the c axis and is interpreted in terms of the relative motion of the Cr3+ ion with respect to the nearest-neighbor oxygen ions. An additional finding is that there is a significant difference in the piezospectroscepic tenser for the R1 and R2 lines. This will facilitate a more complete determination of the stress tenser from fluorescence measurements than has hitherto been possible.