包覆在铷 - 钴 - 铁纳米立方体上的含高钾的钾 - 镍 - 铬普鲁士蓝类似物中的光增强铁磁性。

Photoenhanced Ferromagnetism in High-K-Containing K-Ni-Cr Prussian Blue Analogues Coated on Rb-Co-Fe Nanocubes.

作者信息

Lee Chi-Hung, Wang Min-Yung, Batsaikhan Erdembayalag, Wu Chun-Ming, Wang Chin-Wei, Li Wen-Hsien

机构信息

Department of Physics, National Central University, Jhongli, Taoyuan 32001, Taiwan.

Neutron Group, National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan.

出版信息

ACS Omega. 2017 Aug 4;2(8):4227-4236. doi: 10.1021/acsomega.7b00565. eCollection 2017 Aug 31.

DOI:10.1021/acsomega.7b00565

PMID:31457717

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6641770/

Abstract

A large enhancement of the Ni and Cr ferromagnetic moments under UV-light irradiation has been detected in 55 nm thick KNi[Cr(CN)][(HO)]·0.11HO Prussian blue analogues coated on 240 nm RbCo[Fe(CN)][(HO)]·0.56HO nanocubes. Two separate magnetic transitions were found. The one at 72 K marks the magnetic ordering of the Ni and Cr ions on the shell. A higher degree of electronic connection along the Ni-N-C-Cr-C-N-Ni chains was achieved by the incorporation of a larger amount of K ions into the voids enclosed by the NiN and CrC octahedra, which was used to understand the appearance of photoenhanced ferromagnetism in the K-Ni-Cr network. A weak moment developed in the core below 10 K, corresponding to separate ordering of the Co and Fe ions in the Rb-Co-Fe network. Photoinduced ferromagnetism of the Co and Fe ions in the Rb-Co-Fe was also detected.

摘要

在涂覆于240 nm厚的RbCo[Fe(CN)₆][(H₂O)₅]·0.56H₂O纳米立方体上的55 nm厚的KNi[Cr(CN)₆][(H₂O)₅]·0.11H₂O普鲁士蓝类似物中，检测到紫外光照射下Ni和Cr铁磁矩的大幅增强。发现了两个独立的磁转变。72 K处的转变标志着壳层上Ni和Cr离子的磁有序化。通过将大量K离子掺入由NiN和CrC八面体包围的空隙中，实现了沿Ni-N-C-Cr-C-N-Ni链更高程度的电子连接，这被用于理解K-Ni-Cr网络中光增强铁磁性的出现。在10 K以下，核心中出现了微弱的磁矩，这对应于Rb-Co-Fe网络中Co和Fe离子的单独有序化。还检测到了Rb-Co-Fe中Co和Fe离子的光致铁磁性。