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Low Temperature Deposition of Magnetic Materials on Topological Materials

Award Information
Agency: Department of Defense
Branch: Army
Contract: W911NF-20-P-0009
Agency Tracking Number: A19B-007-0148
Amount: $166,500.00
Phase: Phase I
Program: STTR
Solicitation Topic Code: A19B-T007
Solicitation Number: 19.B
Solicitation Year: 2019
Award Year: 2020
Award Start Date (Proposal Award Date): 2019-12-20
Award End Date (Contract End Date): 2020-07-01
Small Business Information
21 A Street
Burlington, MA 01803
United States
DUNS: 829501225
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Xiaoling (Amy) Shi
 (617) 910-0186
Business Contact
 Hui Lu
Phone: (978) 376-4205
Research Institution
 Northeastern University
 Daniel Dapkas Daniel Dapkas
360 Huntington Avenue
Boston, MA 02115
United States

 (617) 373-5154
 Nonprofit College or University

n conjunction with ferromagnetic and antiferromagnetic materials the topological insulators are elements of future magnetic random access memory (MRAM) and GHz-to-THz frequency sources (spin-torque nano-oscillators, STNO). One of the major challenges in applying topological insulators (TIs) in magnetic devices is the mutual incompatible deposition processes. TIs are usually destroyed by the high temperatures needed for growing high quality magnetic insulators. Here we propose to utilize low-temperature (<100C)spin spray deposition to deposit high-crystalline quality magnetic (Ni-ferrites, NiZn-ferrites, etc.) and antiferromagnetic (NiO, CoO, etc.) oxides on TIs. Spin-spray deposition has been developed by the principal investigators for depositing different ferrites, ZnO, Al2O3, etc. on various substrates such as Si, SiO2, mica, PCB and others for integrated microwave ferrite devices. Spin spray deposition process will be developed and optimized for high-crystalline quality ferrite/TI and antiferromagnet/TI heterostructures with a clean interface with strong spin-orbit coupling. Extensive characterization will be carried out on the magnetic, electronic, structural and chemical properties, and their relation to spin spay processing conditions, and spin-orbital coupling in ferrite/TI and antiferromagnet/TI heterostructures. Control of magnetic anisotropy, magnetodynamics, and antiferromagnetic Neél order driven by electrical current through the topological insulator will be carried out in spin spray deposited ferrite/TI and antiferromagnet/TI heterostructures.

* Information listed above is at the time of submission. *

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