Abstract
This paper describes some recent progress in the high magnetic field laboratory at Osaka. The latest results obtained by use of a two-layer magnet is shown with a brief discussion. A new one-layer coil which has a large bore of 80 mm has been introduced recently. A highly sensitive magnetometer using pulsed high fields has been applied to study the small diamagnetism and diamagnetic susceptibility of water has been investigated. A sudden change in the susceptibility at the frost point was observed. This result implies that diamagnetism in water is not ruled by the distance between molecules but by the interaction such as hydrogen bonding. The temperature dependence of the number of hydrogen bonds is also discussed.
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