What is it about?
Limitations of conventional approaches have made it difficult to explore what may really come out when magnetic molecules are simultaneously bridged between two ferromagnetic metals and alloys films. Prior molecular spintronics devices focusing on the experimental realization of ferromagnetic metals and magnetic molecules incurred a large number of defects that undermine the transformative potential of magnetic molecules. This paper utilizes a commercially mature magnetic tunnel junction (MTJ) to harness the potential of magnetic molecules. With MTJ based molecular spintronics device approach molecule get an unprecedented opportunity to show > 10 um long-range effect on magnetic properties of ferromagnetic films.
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Why is it important?
So far molecules are assumed as a device channel in molecular spintronics devices. However, negligible attention was given to the fact that a molecule can be near perfect spin filter or exchange couplers between two ferromagnetic films. In that case, molecules can transform the spin density of states of the ferromagnetic electrodes itself. This paper underlines the importance of studying the effect of the molecule as a transformative agent. This paper also underlines the importance of using a fabrication approach that allows molecules to do its magic to the fullest extent and minimize the role of uncontrollable defects.
Perspectives
While working on a magnetic tunnel junction based molecular spintronics approach we did not imagine if few molecules connected to two ferromagnetic films can produce a dramatic change that can be observed at room temperature in a big area. Magnetic Force Microscopy was conducted and we observed vivid results. Also, such dramatic changes in magnetic properties are associated with other phenomena such as high as 7 orders of current suppression. MTJ based Molecular spintronics device approach is in a need for further investigation by other more resourceful labs and institutions to observe the unprecedented effect. This approach may address the critical challenges faced by conventional approaches and may add a new dimension in the future advancement of the MTJ research domain.
Director of Center for Nanotechnology Research and Education Pawan Tyagi
University of the District of Columbia
Read the Original
This page is a summary of: Magnetic force microscopy revealing long range molecule impact on magnetic tunnel junction based molecular spintronics devices, Organic Electronics, December 2019, Elsevier,
DOI: 10.1016/j.orgel.2019.105421.
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