Nuclear spin relaxation of 111Cd at the A site in spinel oxides, CdFe2O4 and CdIn2O4
Nuclear spin relaxation of 111Cd at the A site in spinel oxides, CdFe2O4 and CdIn2O4
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DOI：
10.1007/s10967-018-5855-8
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发表时间：
2018-04
影响因子：
1.6
通讯作者：
W. Sato;S. Komatsuda;Y. Ohkubo
中科院分区：
文献类型：
--
作者：
W. Sato;S. Komatsuda;Y. Ohkubo
用111In(→111Cd)和111mCd(→111Cd)探针，用时差微扰角相关光谱测量了正常尖晶石氧化物CdFe2O4和CdIn2O4的局域场。尽管有相同的子核，但用不同的探针获得的光谱显示出对比的图案：前者表现为具有明显振荡结构的静态微扰，而后者的角关联逐渐变得各向同性。对111mCd(→111Cd)探测器的光谱观察到的指数型弛豫图案表明，占据CdAsite的探测器经历了引起核自旋弛豫的随时间变化的微扰。
Local fields in normal spinel oxides, CdFe2O4and CdIn2O4, were measured by means of time-differential perturbed angular correlation spectroscopy with the111In(→111Cd) and111mCd(→111Cd) probes. The spectra obtained with the different probes show contrastive patterns in spite of the same daughter nuclei: the former shows static perturbations with explicit oscillatory structures, whereas for the latter, the angular correlations become gradually isotropic. The exponential-like relaxation patterns of the spectra observed for the111mCd(→111Cd) probe suggest that the probes occupying the CdAsite experience time-dependent perturbation causing nuclear spin relaxation.