单扰动γ-γ角相关测量中Hf掺杂金红石多探针电四极微扰的研究
Study of Electric Quadrupole Perturbation at Multiple Probe Sites in Hf-doped Rutile in a Single Perturbed γ-γ Angular Correlation Measurement
摘要：
两种不同的探针，即，采用软化学方法将111 In/111 Cd和181 Hf/181 Ta同时掺入到纯金红石和Hf掺杂的金红石型钛白（TiO 2）体系中。利用时间微分扰动角相关（TDPAC）技术，在单次时间微分扰动角相关（LIST）数据采集中，可以提取同一样品中两个不同探针位置周围的局部信息。通过共沉淀法将两种探针掺入到金红石样品中，然后在1273 K下退火10 h得到金红石结构。通过超精细参数，即，四极频率（ωQ）和不对称性（η）。在111 Cd位，ωQ=16.8（1）Mrad/s，η =0.19（1）;在181 Ta位，ωQ=127.2（2）Mrad/s，η =0.56（1）。由于掺杂5和10原子%的Hf，样品部分地失去了晶体的纯度，并且这一事实在两个探针位点处都得到了反映。
英文摘要：
Two different probes, viz., 111In/111Cd and 181Hf/181Ta, simultaneously have been incorporated in both pure rutile and Hafnium (Hf) -doped rutile Titanium Dioxide (TiO2) systems following a soft chemical method. The local information around two different probe sites in the same sample could be extracted in a single Time Differential Perturbed Angular Correlation (TDPAC) measurement using LIST mode data acquisition. The two probes were incorporated in the rutile samples by co-precipitation technique and then annealed at 1273K for 10h to get the rutile structure. The rutile structure was identified by the hyperfine parameters, viz., quadrupole frequency (ωQ) and asymmetry (eta). At 111Cd site, ωQ=16.8(1) Mrad/s and eta=0.19(1) while at 181Ta site, ωQ=127.2(2) Mrad/s and eta=0.56(1). Due to the doping of Hf at 5 and 10 atom%, the sample partially lost the purity of the crystal and the fact has been reflected at both the probe sites.
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