Giant Magnetoresistance in a Molecular Thin Film as an Intrinsic Property |
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| Authors: | Luca Pilia Michele Serri Michio M Matsushita Kunio Awaga Sandrine Heutz Neil Robertson |
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| Affiliation: | 1. EaStCHEM School of Chemistry, University of Edinburgh King's Buildings, Edinburgh, UK;2. Department of Materials and London Centre for Nanotechnology, Imperial College London, London, UK;3. Department of Chemistry, Graduate School of Science and Research Center of Materials Science, Nagoya University, Chikusa‐ku, Nagoya, Japan |
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| Abstract: | The magnetic, thin‐film structural, conductivity, and magnetoresistance properties of Ni(quinoline‐8‐thiolate)2] (Ni(qt)2]) are studied. The conducting and magnetoresistance properties are studied in single crystals and in evaporated thin films through deposition on an interdigitated electrode array. Non‐linear conductivity interpreted through a space‐charge limited conduction mechanism with charges injected from the electrodes is observed. Under applied magnetic field, the material displays giant negative magnetoresistance above 50% at 2 K in both single crystals and in evaporated thin films. The effect can still be observed at 200 K and is interpreted in terms of a double exchange mechanism with the shape of the curve determined by the magnetic anisotropy. The unique observation of giant magnetoresistance (GMR) as an intrinsic effect in an evaporated thin film of paramagnetic molecules opens up new possibilities in organic spintronics. |
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| Keywords: | spintronics organic electronics molecular electronics magnetic chains anisotropy |
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