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Center for Advanced High Magnetic Field Science

The Center for Advanced High Magnetic Field Science, hereafter abbreviated as AHMF center, dates back to 1980 when an emeritus professor Muneyuki Date founded high magnetic field laboratory in a faculty of science. Three laboratories (high magnetic field, high pressure, and micro-beam fabrication, the latter two labs belonged to a faculty of engineering science) were united to establish the Research Center for Extreme Materials in 1986, and it was reorganized twice into the Research Center for Materials Science at Extreme Conditions in 1996, and then the Center for Quantum Science and Technology under Extreme Conditions in 2006. The high magnetic field division in this center was separated and launched in April, 2014 as the AHMF center in a graduate school of science.

The AHMF center has two high magnetic field facilities with large capacitor bank systems (10 MJ and 1.5 MJ maximum charged energy for the first and second high magnetic field facilities, respectively). These capacitor bank systems and homemade pulse magnets enable us to produce high magnetic fields beyond 50 Tesla.
In the first high magnetic field facility, pulsed magnetic fields with a typical duration of about 35 msec are generated, and transport and magnetization measurements have been conducted on mainly conductive materials, such as high-Tc superconductors and heavy-fermion materials.

Recently, we have developed experimental apparatus utilized under complex extreme conditions, namely, ultrahigh magnetic field, ultrahigh pressure, and extremely low temperatures. We plan to develop a wide-bore pulse-magnet that can produce a pulsed magnetic field with the duration of about 100 msec.

In the second high magnetic field facility, magnetization and electron spin resonance (ESR) measurements are carried out on insulating materials such as frustrated magnets and low-dimensional magnets in short pulsed magnetic fields with the duration of about 7 msec. It should be stressed that the ESR apparatuses have the widest frequency-magnetic field observation window in the world.

We also have a 16 Tesla superconducting magnet and perform multi-frequency ESR measurements with high-sensitivity at extremely low temperatures utilizing a 3He-4He dilution refrigerator.