Magnetic Optical Study on Low-Dimensional Magnetic Materials in High-Magnetic-Fields(40 T)

We are interesting in studying the low-dimension magnetic materials, including nano-structural metal (Au) and metal oxides (TiO2), whose bulk properties are non-magnetic. In addition, we will study the magnetic materials whose ionic spins have low-dimension structure, such as 1-D LiCu2O2 and the other complex magnetic materials, Co7(TeO3)4Br6 and Cu9O2(SeO3)4Cl6. All these materials are expected to have various meta-magnetic states in high-magnetic fields. We will setup a portable-type pulsed magnet system to generate pulsed magnetic fields up to 40 T. This system will integrate with a closed-cycle low temperature cooling system (4.2 K), thus we can study the physical properties by controlling different temperatures and magnetic fields. High-field magnetization process will be measured by inductance method and Faraday rotation method, which can observe the meta-magnetic states. By analyzing the meta-magnetic states, we can obtain the spin-spin interaction constant, as well as the coupling between spin, lattice, and charge degrees of freedom. In addition, we plan to measure the photoluminescence spectra in high-magnetic fields, which can provide the information of electronic band structure and charge carriers, as well as their changes in magnetic fields. The goals of this project are: 1) studying the mechanism which makes non-magnetic metal (or metal oxides) becomes magnetic in nano-structure; 2) study the coupling between spin, lattice, and charge of low-dimensional spin structure materials.

Project ID:PA10301-0833
External Project ID:NSC101-2112-M182-001-MY3