Kabushiki Kaisha Toshiba

Tokyo Shibaura Denki Kabushiki Kaisha

Hideki Yamamiya

Koichiro Inomata

Naoyuki Sori

Masashi Sahashi

Tetsuhiko Mizoguchi

Isao Sakai

A magnetic field generator comprises a permanent magnet, and pole pieces magnetically connected to the permanent magnet. The pole pieces are disposed to face each other to generate a magnetic field between them, and have a specific resistance of 20 .mu..OMEGA.-cm or more. The permanent magnet comprises a sintered alloy including iron as a main component, a rare earth element including yttrium, cobalt, and boron. The permanent magnet includes, as its main part, a strong magnetic Fe-rich phase of a tetragonal system, as well as a non-magnetic Laves phase, and preferably has a maximum energy product of 38 MGOe or more.

Magnetic field generator useful for a magnetic resonance imaging

Disclosed is a comprising a powdered alloy composed of 23 to about 29% by weight of samarium, 0.2 to about 7% by weight of titanium, 3 to about 9% by weight of copper, 10 to about 25% by weight of iron, and the balance of cobalt principally; said powdered alloy being sintered to obtain a sintered body, followed by

Permanent magnet

Growing community of inventors

Yamato, Japan

Hideki Yamamiya