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. Rec...
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| Veröffentlicht in: | Nature (London) 2002-04, Vol.416 (6882), p.713-716 |
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| creator | Jedema, F. J Heersche, H. B Filip, A. T Baselmans, J. J. A van Wees, B. J |
| description | 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°, we are able to reverse the sign of the output voltage. |
| doi_str_mv | 10.1038/416713a |
| format | Article |
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J ; Heersche, H. B ; Filip, A. T ; Baselmans, J. J. A ; van Wees, B. J</creator><creatorcontrib>Jedema, F. J ; Heersche, H. B ; Filip, A. T ; Baselmans, J. J. A ; van Wees, B. J</creatorcontrib><description>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°, we are able to reverse the sign of the output voltage.</description><identifier>ISSN: 0028-0836</identifier><identifier>EISSN: 1476-4687</identifier><identifier>DOI: 10.1038/416713a</identifier><identifier>PMID: 11961548</identifier><identifier>CODEN: NATUAS</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Electrical injection of spin polarized carriers ; Electrodes ; Electronic transport in condensed matter ; Electrons ; Exact sciences and technology ; Giant magnetoresistance ; Humanities and Social Sciences ; letter ; Magnetic fields ; Magnetic properties and materials ; Magnetotransport phenomena, materials for magnetotransport ; Materials science ; Metals ; multidisciplinary ; Physics ; Science ; Science (multidisciplinary) ; Spin polarized transport</subject><ispartof>Nature (London), 2002-04, Vol.416 (6882), p.713-716</ispartof><rights>Springer Nature Limited 2002</rights><rights>2002 INIST-CNRS</rights><rights>COPYRIGHT 2002 Nature Publishing Group</rights><rights>Copyright Macmillan Journals Ltd. 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| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Electrical injection of spin polarized carriers Electrodes Electronic transport in condensed matter Electrons Exact sciences and technology Giant magnetoresistance Humanities and Social Sciences letter Magnetic fields Magnetic properties and materials Magnetotransport phenomena, materials for magnetotransport Materials science Metals multidisciplinary Physics Science Science (multidisciplinary) Spin polarized transport |
| title | Electrical detection of spin precession in a metallic mesoscopic spin valve |
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