59Co-NMR Probe for Stepwise Magnetization and Magnetotransport in SrCo6O11 with Metallic Kagomé Layer and Triangular Lattice with Local Moments
59Co-NMR Probe for Stepwise Magnetization and Magnetotransport in SrCo6O11 with Metallic Kagomé Layer and Triangular Lattice with Local Moments
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DOI：
10.1143/jpsj.75.094715
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发表时间：
2006-07
影响因子：
1.7
通讯作者：
H. Mukuda;Y. Kitaoka;S. Ishiwata;Takashi Saito;Y. Shimakawa;H. Harima;M. Takano
中科院分区：
文献类型：
--
作者：
H. Mukuda;Y. Kitaoka;S. Ishiwata;Takashi Saito;Y. Shimakawa;H. Harima;M. Takano
本文报道了srco6o11在零磁场和外加磁场下具有独特的阶梯磁化特性和相关磁输运现象的新型磁性和电子性质。该化合物由三个Co位组成，即金属Kagome层中的Co(1)，层间的Co(2)二聚柱和三角形晶格中的Co(3)。零场核磁共振谱揭示了Co(3)位点的大局部矩在零场下是有序的，没有任何体磁化M的痕迹。场扫描核磁共振波谱表明，在高于2.5 T的场域中，Co(1)位的内部超细场是由Co(3)位的“1”-平台态的完全极化矩M s产生的，而在“1/3”-平台态中，当施加小场时，中间场会产生1/3的M s，因此内部超细场部分被抵消。它已经从一个微观的poi中澄清了。
We report on novel magnetic and electronic properties of SrCo 6 O 11 that exhibits a unique stepwise magnetization and its relevant magnetotransport phenomena investigated by the site-selective 59 Co nuclear magnetic resonance (NMR) at zero and applied magnetic fields. This compound is composed of three Co sites in the unit cell, i.e., Co(1) in the metallic Kagome layer, a Co(2) dimerized pillar between the layers and Co(3) in the triangular lattice. Zero-field NMR spectra have revealed that large local moments at the Co(3) sites are magnetically ordered without any trace of bulk magnetization M at zero field. The field-swept NMR spectra show that the internal hyperfine field at the Co(1) site is derived from fully polarized moments M s at the Co(3) sites in the “1”-plateau state at fields higher than 2.5 T, whereas it is partially cancelled out in the “1/3”-plateau state in which one-third of M s is induced at intermediate fields once a small field is applied. It has been clarified from a microscopic poi...