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arXiv 2201.13074cond-mat.mtrl-scicond-mat.str-el
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Cu $_{2}$ O的核自旋-晶格弛豫研究

Nuclear spin-lattice relaxation studies of Cu$_{2}$O

Yutaka Itoh

摘要:

本文报道了在零场铜核四极共振中,在$T$ = 77 $-$ 325 K下,测量了氧化亚铜Cu $_2$ O的$^{63}$ Cu和$^{65}$ Cu核自旋-晶格弛豫速率.从详细的同位素测量的弛豫率,我们成功地估计了有限的磁弛豫率$^{63}W_M$和一个占主导地位的核四极弛豫率$^{63}W_Q$。$^{63}W_Q$转变为$T^{2.1}$,$^{63}W_M$转变为$T^{1.6}$或$T^β\mathrm{exp}(-\itΔ/T)$,$β$ = 0.6(3),$\itΔ$ = 190(62)K。讨论了非简并费米气体引起的核自旋散射过程作为磁弛豫的可能候选过程。

英文摘要:

We report the $^{63}$Cu and $^{65}$Cu nuclear spin-lattice relaxation rate measurements of cuprous oxide Cu$_2$O in a zero field Cu nuclear quadrupole resonance at $T$ = 77$-$325 K. From the detailed isotopic measurements of the relaxation rates, we successfully estimated a finite magnetic relaxation rate $^{63}W_M$ and a predominant nuclear quadrupole relaxation rate $^{63}W_Q$. $^{63}W_Q$ changed as $T^{2.1}$, while $^{63}W_M$ changed as $T^{1.6}$ or $T^β\mathrm{exp}(-\itΔ/T)$ with $β$ = 0.6(3) and $\itΔ$ = 190(62) K. The nuclear spin scattering process due to a non-degenerate Fermi gas was discussed as a possible candidate of the magnetic relaxation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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