Accession Number:

ADD014062

Title:

Method of Transforming a Passive Ferromagnetic Material into a Permanent Magnet.

Descriptive Note:

Patent Application, Filed 20 Mar 89,

Corporate Author:

DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s):

• Leupold, Herbert A.

Report Date:

1989-03-20

Pagination or Media Count:

8.0

Abstract:

A passive ferromagnetic material is transformed into a permanent magnet with more than double the existing energy product or strength by encasing a bar of the passive ferromagnetic material in an annular shell of superconductive material at a temperature above the transition temperature of the superconductive material, placing the encased ferromagnetic material into an axial magnetic field providing sufficient oersteds to magnetize the passive ferromagnetic material thereby enclosing a large amount of flux in the superconducting shell, lowering the temperature to below the transition temperature of the superconductive material whereupon all of the enclosed flux is permanently trapped, and removing the axial magnetic field. Patent applications. jhd

Descriptors:

• *PATENT APPLICATIONS
• *PERMANENT MAGNETS
• *SUPERCONDUCTORS
• FERROMAGNETIC MATERIALS
• MAGNETIC FIELDS
• FABRICATION
• PASSIVE SYSTEMS
• SHELLS(STRUCTURAL FORMS)
• SUPERCONDUCTIVITY
• TRANSITION TEMPERATURE

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE