1. High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. Analytical Instrumentation Center, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
4. Key Laboratory of Anhui Province for High Field Magnetic Resonance Imaging, Hefei 230031, China
5. High Magnetic Field Laboratory of Anhui Province, Hefei 230031, China
6. Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China