Design and Synthesis of Novel Materials for Spin Caloritronic Devices

Project Personnel

Gregory Fiete

Principal Investigator

Northeastern University

Email

Jianshi Zhou

University of Texas, Austin

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Chia-Ling Chien

Johns Hopkins University

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Funding Divisions

Division of Materials Research (DMR), Office of Multidisciplinary Activities (OMA), Electrical, Communications and Cyber Systems (ECCS)

Microelectronics, which has propelled modern technologies to unprecedented levels, has been severely hampered by the intense Joule heating generated by the motion of electrical charge carriers. A new approach exploits pure spin currents in devices that use a minimum of electrical charge carriers, thus generating minimal heat in metals and virtually no heat in magnetic insulators, which are charge-carrier free. The spin Seebeck effect (SSE) allows one to generate a pure spin current from a temperature gradient in a magnetic insulator. The SSE, experimentally discovered only a few years ago, has lead to a burgeoning new field known as spin caloritronics, which offers new strategies for the conversion of waste heat to electricity as well as thermal management in electronic devices. This project, through close theory/experiment interactions, will focus on the fundamental understanding of the SSE effect and will explore new ferromagnetic and antiferromagnetic insulators for advancing spin caloritronic phenomena and devices.