New results have been produced in the test system of the steady-state strong magnetic field experimental device. Recently, a group of professor Zhu Hong from the University of Science and Technology of China used the electronic spin resonance test system of the steady-state strong magnetic field experimental device to study the compressive strain (La, Ba) MnO3 film. Magnetocrystalline anisotropy, the results of which were recently published in the Journal of Applied Physics. The scientific experimental test system of the Strong Magnetic Field Science Center of the Chinese Academy of Sciences includes the transportation experimental test system, the magnetic experimental test system, the magneto-optical experimental test system, the extremely low temperature experimental test system, the high voltage experimental test system and the combined microscopy system. The Zhu Hong team's experiment used a series of researches using the "electron paramagnetic resonance spectrometer" in the magnetic experiment test system. The experimental results show that in Sr or Ca-doped manganese oxide ferromagnetic thin films, the easy magnetization axis is along the direction of tensile strain. This work uses corner ferromagnetic resonance technology and found that the situation is reversed in Ba-doped films, and the easy magnetization direction corresponds to the in-plane compressive strain direction. The experimental out-of-plane resonance position is as high as 12 thousand Oersteds (kOe), indicating that in addition to the shape anisotropy, the magnetocrystalline anisotropy is very considerable and easy to face. This "abnormal" behavior of magnetocrystalline anisotropy reflects that the manganese oxide is consistent with the physical content of the Bethe-Slater curve. (La, Ba) MnO3 is the same as Co and Ni, and the easy magnetization axis is along the compression direction; while the other two doped manganese oxides (LaCa), (LaSr) and a-Fe behave oppositely. The Strong Magnetic Field Science Center was established on April 30, 2008. It is a national major scientific project in the "Eleventh Five-Year Plan" period supported by the National Development and Reform Commission. The long-term preset goals of the center include the generation of strong magnetic fields, physical property research under strong magnetic fields, and scientific and technological inventions relying on strong magnetic field experimental devices. Its experimental facilities include magnet devices and scientific experimental test systems. In 2010, part of the magnet device and test system were completed, and it has begun to be put into trial operation and opened to users one after another, basically achieving "while construction". The overall goal of the construction of the steady-state strong magnetic field experimental device project is to establish a 40T class steady-state hybrid magnet experimental device and a series of high-power water-cooled magnet and superconducting magnet experimental devices for different purposes, so that China's strong magnetic field ranks among the world's advanced. At present, the SM3 of the four superconducting magnets and the supporting nuclear magnetic resonance spectrometer have been jointly tuned, and have carried out a number of structural biology and pharmacological research. SM2 has been successfully debugged and is being tuned with the combined microscopic testing system SMA . With regard to the magnet device, the strong magnetic field center has successfully developed the first domestic superconducting magnet for cable conductors in niobium-thin-tin tubes and the first well-heating furnace system for well-type vacuum-filled vacuum protection in China.
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