Low-energy excitations in the electron-doped metal phthalocyanine Li_(0.5)MnPc  from ~7Li and ~1H NMR

M. Filibian; P. Carretta; T. Miyake; Y. Taguchi; Y. Iwasa

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Low-energy excitations in the electron-doped metal phthalocyanine Li_(0.5)MnPc from ~7Li and ~1H NMR

机译：来自〜7Li和〜1H NMR的电子掺杂金属酞菁Li_（0.5）MnPc中的低能激发

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NMR and magnetization measurements in Li_(0.5)MnPc (Pc ≡ C_(32)H_(16)N_(8)), recently proposed as a strongly correlated metal, are presented. Two different low-frequency dynamics are evidenced. The first one, probed by ~1H nuclei, gives rise to a slowly relaxing magnetization at low temperature and is associated with the freezing of MnPc S = 3/2 spins. This dynamics is similar to the one observed in pristine β-MnPc and originates from Li-depleted chain segments. The second one, evidenced by the ~7Li spin-lattice relaxation rate, is associated with the hopping of the electrons along Li-rich chains. The characteristic correlation times for the two dynamics are derived, and the role of the disorder is briefly discussed.

机译：提出了最近提出作为强相关金属的Li_（0.5）MnPc（Pc C_（32）H_（16）N_（8））中的NMR和磁化强度测量结果。证明了两种不同的低频动力学。第一个被〜1H原子核探测，在低温下产生缓慢松弛的磁化强度，并与MnPc S = 3/2自旋的冻结有关。这种动力学类似于在原始β-MnPc中观察到的动力学，并且起源于贫锂链段。第二个由〜7Li自旋晶格弛豫速率证明，与电子沿富Li链的跳跃有关。推导了两种动力学的特征相关时间，并简要讨论了疾病的作用。

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来源
《Physical review. B, Condensed Matter And Materials Physics》 |2007年第8期|p.085107.1-085107.8|共8页
作者
M. Filibian; P. Carretta; T. Miyake; Y. Taguchi; Y. Iwasa;
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作者单位

Department of Physics 'A.Volta,' University of Pavia, Via Bassi 6, I-27100, Pavia, Italy;

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正文语种 eng
中图分类固体物理学;
关键词
strongly correlated electron systems; heavy fermions; relaxation effects; molecular magnets;

机译：强相关电子系统;重费米子;弛豫效应;分子磁体;

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1. Low-energy excitations in electron-doped metal phthalocyanines [J] . Filibian M, Carretta P, Miyake T, Physica, B. Condensed Matter . 2008,第5a9期

机译：电子掺杂金属酞菁中的低能激发
2. Soft-Chemistry of Garnet-Type Li_(5+x)Ba_xLa_(3-x)Nb2O_(12) (x = 0, 0.5,1): Reversible H~+ <-> Li~+ Ion-Exchange Reaction and Their X-ray, ~7Li MAS NMR, IR, and AC Impedance Spectroscopy Characterization [J] . Lina Truong, Venkataraman Thangadurai Chemistry of Materials: A Publication of the American Chemistry Society . 2011,第17期

机译：石榴石型Li_（5 + x）Ba_xLa_（3-x）Nb2O_（12）的软化学（x = 0，0.5,1）：可逆H〜+ <-> Li〜+离子交换反应及其X射线，〜7Li MAS NMR，IR和AC阻抗谱表征
3. Influence of particle size on solid solution formation and phase interfaces in Li_(0.5)FePO4 revealed by ~(31)P and ~7Li solid state NMR spectroscopy [J] . L. J. M. Davis, I. Heinmaa, B. L. EIlis Physical chemistry chemical physics: PCCP . 2011,第11期

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4. IMPEDANCE,DIELECTRIC SPECTROSCOPIES AND ~7Li NMR SPECTROSCOPY AS TOOLS FOR THE DETERMINATION OF THE Li~+ DYNAMICS IN THE POLYCRYSTALLINE FAST IONIC CONDUCTOR Li_(3x)La_(2/3-x)TiO_3 [C] . Odile Bohnkg, Joel Emery, Jean-Claude Badot The Meeting of the Electrochemical Society . 2003

机译：阻抗，介电光谱和〜7LI NMR光谱作为测定多晶快速离子导体中Li +动力学的工具Li_（3x）La_（2/3-x）TiO_3
5. Heterogeneous Coordination Environments in Lithium-Neutralized Ionomers Identified Using 1H and 7Li MAS NMR [O] . Todd M. Alam, Janelle E. Jenkins, Dan S. Bolintineanu, 2012

机译：使用1H和7Li MAS NMR鉴定的锂中和离聚物中的非均相配位环境
6. Low-energy excitations in electron-doped metal phthalocyanine from NMR in Li$_{0.5}$MnPc [O] . Filibian, M., Carretta, P., Miyake, T., 2006

机译：来自NmR的电子掺杂金属酞菁的低能激发 in Li $ _ {0.5} $ mnpc

Low-energy excitations in the electron-doped metal phthalocyanine Li_(0.5)MnPc from ~7Li and ~1H NMR

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