Spin Wave Heat Transfer

 


New findings that will solve the heat generation issue in electronic devices was introduced on September 26 in the online edition of Matter. A team of researchers are enhancing spin wave technology in new ways and a new solution to the heat generation problem has emerged. 

Spin waves are waves that transmit information. This is done without the flow of electrons by using the spin features of electrons in magnetic insulators. New research shows that the temperature imbalance of spin waves increases the information carrying efficiency of spin waves. An example of this is the tendency of spin waves on one side of the material to become hot and one side colder. 

A team assembled from POSTECH Chungham National University and KAIST. The researchers were inspired by radiator fins to cool a car engine. They made a nanometer-scale gold structure. One end is made of a magnetic structure and One end is made of a magnetic insulator, designed to regulate temperature based on the gold concentration. The gold structures reduced the temperature of the spin waves at the specific target location. This created a temperature imbalance within the material. The thin film method improved spin wave transfer by over 250%! This study is the first to report the control of spin wave temperature and suggest a method for enhancing this control.

Professor Hyungyu Jin of POSTECH led the research. He summarized, "this research represents a significant milestone in developing next generation information transfer technologies to address heat generation in electronics."

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