Room-temperature tunnel magnetoresistance across biomolecular tunnel junctions based on ferritin
نویسندگان
چکیده
Abstract We report exceptionally large tunnel magnetoresistance (TMR) for biomolecular junctions based on ferritins immobilized between Ni and EGaIn electrodes. Ferritin stores iron in the form of ferrihydrite nanoparticles (NPs) fulfills following roles: (a) it dictates barrier, (b) magnetically decouples NPs from ferromagnetic (FM) electrode, (c) stabilizes NPs, (d) acts as a spin filter reducing complexity since only one FM electrode is required. The mechanism charge transport long-range tunneling which results TMR 60 ± 10% at 200 K 25 5% room temperature. propose magnon-assisted transmission to explain substantially larger switching fields (up 1 Tesla) than characteristic coercive (a few Gauss) ferritin particles T < 20 K. These highlight genuine potential designing functional nanoscale spintronic devices.
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ژورنال
عنوان ژورنال: JPhys materials
سال: 2021
ISSN: ['2515-7639']
DOI: https://doi.org/10.1088/2515-7639/abfa79