59Co NMR study on local magnetic properties of misfit layered Co oxides with rocksalt-type and CoO2 layers

被引：2
|
作者：
Takami, Tsuyoshi [1 ]
Umeshima, Yasuhide [1 ]
Nanba, Hiroshi [1 ]
Itoh, Masayuki [1 ]
机构：
[1] Nagoya Univ, Grad Sch Sci, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan
来源：
25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4: QUANTUM PHASE TRANSITIONS AND MAGNETISM | 2009年 / 150卷
关键词：
MODULATED STRUCTURE; STATES;
D O I：
10.1088/1742-6596/150/4/042199
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
(59)Co NMR measurements have been performed to study the local magnetic properties of [Ca(2)CoO(3)](0.62)CoO(2) (CCO) and [Ca(2)Co(1.3)Cu(0.7)O(4)](0.62)CoO(2) (CCCO). The (59)Co NMR spectra with several components at 4.2 K under zero external field show the existence of the several Co sites. From the field dependence of the resonance frequency in CCO, three of them at higher frequencies are found to have antiferromagnetic (AF) internal fields, whereas the other two have paramagnetic (PM) and ferromagnetic (FM) ones. Furthermore, the changes in the (59)Co NMR spectra of these misfit layered Co oxides with varying temperature are consistent with the phase diagrams proposed by the mu(+)SR and magnetization measurements.
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页数：4
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