Jo, Junhyeon Byun, Jinho Oh, Inseon Park, Jungmin Jin, Mi-Jin Min, Byoung-Chul Lee, Jaekwang Yoo, Jung-Woo 2024-01-19T21:02:57Z 2024-01-19T21:02:57Z 2021-09-05 2019-01 1936-0851 https://pubs.kist.re.kr/handle/201004/120509 Individual molecular spins are promising quantum states for emerging computation technologies. The "on surface" configuration of molecules in proximity to a magnetic film allows control over the orientations of molecular spins and coupling between them. The stacking of planar molecular spins could favor antiferromagnetic interlayer couplings and lead to pinning of the magnetic underlayer via the exchange bias, which is extensively utilized in ultrafast and high-density spintronics. However, fundamental understanding of the molecular exchange bias and its operating features on a device has not been unveiled. Here, we showed tunable molecular exchange bias and its asymmetrical magnetotransport characteristics on a device by using the metalloporphyrin/cobalt hybrid films. A series of the distinctive molecular layers showcased a wide range of the interfacial exchange coupling and bias. The transport behaviors of the hybrid bilayer films revealed the molecular exchange bias effect on a fabricated device, representing asymmetric characteristics on anisotropic and angle-dependent magnetoresistances. Theoretical simulations demonstrated close correlations among the interfacial distance, magnetic interaction, and exchange bias. This study of the hybrid interfacial coupling and its impact on magnetic and magnetotransport behaviors will extend functionalities of molecular spinterfaces for emerging information technologies. English AMER CHEMICAL SOC Molecular Tunability of Magnetic Exchange Bias and Asymmetrical Magnetotransport in Metalloporphyrin/Co Hybrid Bilayers Article 10.1021/acsnano.8b08689 1 ACS NANO, v.13, no.1, pp.894 - 903 ACS NANO 13 1 894 903 scie scopus 000456749900093 2-s2.0-85059374353 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article SPIN-ORBIT TORQUE GIANT MAGNETORESISTANCE TRANSITION INTERFACE INJECTION QUBITS METAL exchange bias molecular spin antiferromagnet organic spinterface anisotropic magnetoresistance planar Hall resistance