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      Organic magnetic-field-effect transistors and ultrasensitive magnetometers

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      Journal of Applied Physics
      AIP Publishing

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          Interfacial charge-spin coupling: Injection and detection of spin magnetization in metals.

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            Electrical detection of spin precession in a metallic mesoscopic spin valve.

            To study and control the behaviour of the spins of electrons that are moving through a metal or semiconductor is an outstanding challenge in the field of 'spintronics', where possibilities for new electronic applications based on the spin degree of freedom are currently being explored. Recently, electrical control of spin coherence and coherent spin precession during transport was studied by optical techniques in semiconductors. Here we report controlled spin precession of electrically injected and detected electrons in a diffusive metallic conductor, using tunnel barriers in combination with metallic ferromagnetic electrodes as spin injector and detector. The output voltage of our device is sensitive to the spin degree of freedom only, and its sign can be switched from positive to negative, depending on the relative magnetization of the ferromagnetic electrodes. We show that the spin direction can be controlled by inducing a coherent spin precession caused by an applied perpendicular magnetic field. By inducing an average precession angle of 180 degrees, we are able to reverse the sign of the output voltage.
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              Is Open Access

              Finite-element theory of transport in ferromagnet-normal metal systems

              We formulate a theory of spin dependent transport of an electronic circuit involving ferromagnetic elements with non-collinear magnetizations which is based on the conservation of spin and charge current. The theory considerably simplifies the calculation of the transport properties of complicated ferromagnet-normal metal systems. We illustrate the theory by considering a novel three terminal device.
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                Author and article information

                Journal
                Journal of Applied Physics
                Journal of Applied Physics
                AIP Publishing
                0021-8979
                1089-7550
                January 15 2005
                January 15 2005
                : 97
                : 2
                : 024510
                Article
                10.1063/1.1831546
                ff9bfe82-b9e0-49d8-b3a6-ae3284fcedc4
                © 2005
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