59Co NMR study on local magnetic properties of Ca1−xNaxCo2O4
59Co NMR study on local magnetic properties of Ca1−xNaxCo2O4
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Ca1−xNaxCo2O4 局部磁性能的 59Co NMR 研究
DOI：
10.1088/1742-6596/200/1/012197
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
E. Takayama
中科院分区：
文献类型：
--
作者：
T. Takami;M. Itoh;M. Isobe;M. Arai;T. Kawashima;E. Takayama
利用~（59）Co NMR研究了首次在高压下合成的新体系Ca_（1 − x）NaxCo_（2 O）_4（x = 0-0.6）的局域磁性。这些材料的59 Co NMR谱的奈特位移是小的，几乎T-独立的，即使当Ca离子被Na取代到x = 0.6。此外，磁秩序是没有观察到的至少下降到4.2 K的样品与x = 0-0.6在这项工作中制备。为了解释这些特殊的磁性行为，空穴的位置选择性分布进行了讨论。
59Co NMR measurements have been performed to study the local magnetic properties of Ca1−xNaxCo2O4 with x = 0-0.6, which is a new system synthesized for the first time under a high pressure. The Knight shift of the 59Co NMR spectra for these materials is small and almost T-independent even when the Ca ions are substituted by Na up to x = 0.6. Furthermore, a magnetic order is not observed at least down to 4.2 K for the samples with x = 0-0.6 prepared in this work. In order to explain these peculiar magnetic behaviors, site-selective distribution of holes has been discussed.
影响因子：
3.7
作者：
J. Sugiyama;H. Itahara;J. Brewer;E. Ansaldo;T. Motohashi;M. Karppinen;H. Yamauchi
通讯作者：
J. Sugiyama;H. Itahara;J. Brewer;E. Ansaldo;T. Motohashi;M. Karppinen;H. Yamauchi