Room temperature-operating spin-valve transistors formed by vacuum bonding |
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Authors: | DJ Monsma R Vlutters JC Lodder |
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Institution: | MESA Research Institute, University of Twente, 7500AE Enschede, Netherlands. |
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Abstract: | Functional integration between semiconductors and ferromagnets was demonstrated with the spin-valve transistor. A ferromagnetic multilayer was sandwiched between two device-quality silicon substrates by means of vacuum bonding. The emitter Schottky barrier injected hot electrons into the spin-valve base. The collector Schottky barrier accepts only ballistic electrons, which makes the collector current very sensitive to magnetic fields. Room temperature operation was accomplished by preparing Si-Pt-Co-Cu-Co-Si devices. The vacuum bonding technique allows the realization of many ideas for vertical transport devices and forms a permanent link that is useful in demanding adhesion applications. |
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