Japan Science and Technology Agency

Florida State University Research Foundation, Inc.

Hitachi, Ltd.

The University of Tokyo

Akiyasu Yamamoto

Eric E Hellstrom

Jeremy Weiss

Motomune Kodama

Kazuhide Tanaka

Junichi Shimoyama

The present invention provides for polycrystalline superconducting permanent magnets which are synthesized of doped superconducting (AE) FeAscompounds, where AE denotes an alkaline earth metal, such as Ba, Sr, Mg or Ca. The superconducting permanent magnets of the present invention can be magnetized in their superconducting state by induced currents, resulting in trapped magnetization that scales with the size of the bulk material. The magnitude of the trapped field has been demonstrated to be over 1 T and is predicted to be over 10 T if the technology is scaled, which is much higher than the capabilities of permanent magnets and other superconducting polycrystalline bulks currently known in the art.

Iron-based superconducting permanent magnet and method of manufacture

An MgBsuperconducting wire excellent in critical current density property is supplied by using a crystalline boron powder which is low in costs and easy to obtain. For the wire, a precursor of the MgBsuperconducting wire is used, the precursor having a linear structure including a core region containing a magnesium powder and a boron powder, and a sheath region formed of a metal covering an outer circumferential portion of the core region. The boron powder is crystalline, and has a volume-mean particle size of 2 &#x3bc;m or less.

Precursor of MgB2 superconducting wire, and method for producing the same

Growing community of inventors

Tokyo, Japan

Akiyasu Yamamoto