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TRULY UNCOUPLED SPIN VALVE MATERIAL

Award Information

Agency:
National Science Foundation
Branch:
N/A
Award ID:
27357
Program Year/Program:
1994 / SBIR
Agency Tracking Number:
27357
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
NVE CORP. (FORMERLY NONVOLATILE ELECTRONICS, INC.
11409 Valley View Road Eden Prairie, MN -
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1994
Title: TRULY UNCOUPLED SPIN VALVE MATERIAL
Agency: NSF
Contract: N/A
Award Amount: $64,975.00
 

Abstract:

SPIN VALVE MATERIALS HAVE GREAT APPLICATION POTENTIAL IN MAGNETORESISTIVE RANDOM ACCESS MEMORY (MRAM), TAPE OR DISK READ HEADS, AND MAGNETIC FIELD SENSORS. HOWEVER, POSITIVE COUPLING BETWEEN THE TWO MAGNETIC LAYERS IS ALWAYS PRESENT IN SO-CALLED "UNCOUPLED" SPIN VALVE MATERIALS TODAY AND PRESENTS A ROADBLOCK FOR THE WIDESPREAD USE OF THOSE MATERIALS. THIS COUPLING REDUCES THE EFFECTIVE ANISOTROPY FIELD FOR MRAM MEMORY CELLS, REDUCES FIELD SENSITIVITY FOR SENSORS, AND MAY PREVENT "SINGLE DOMAIN" BEHAVIOR IN SPIN VALVE DEVICES. POSITIVE COUPLING IS BELIEVED TO BE CAUSED BY CORRELATED ROUGHNESS OF THE INTERFACES OF THE MAGNETIC LAYERS THROUGH A DIPOLE-TO-DIPOLE COUPLING EFFECT. TO OBTAIN TRULY UNCOUPLED SPIN VALVE MATERIALS, RESEARCHERS ARE DEVELOPING A NUMBER OF APPROACHES TO CONTROL THE INTERFACE QUALITY AND FLATNESS, AND CRYSTAL ORIENTATION OF THE SPIN VALVE MATERIALS USING INDUSTRY-STANDARD EQUIPMENT. SOME OF THE PROPOSED APPROACHES MAY ALSO INDUCE A BENEFICIAL ANTIFERROMAGNETIC EXCHANGE COUPLING.

Principal Investigator:

James M Daughton
6128299217

Business Contact:

Small Business Information at Submission:

Nonvolatile Electronics Inc.
11409 Valley View Rd Eden Prairie, MN 55344

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No