Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence
Spin filtering happens due to the discriminative tunneling probabilities for spin-up and spin-down electrons through a magnetic barrier and can result in highly spin polarized tunnel currents. Combining two such barriers in a tunnel junction thus leads to large magnetoresistance without the necessit...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51375 https://orcid.org/0000-0002-2480-1211 |
| _version_ | 1810980135820591104 |
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| author | Moodera, Jagadeesh Muller, Martina Miao, Guoxing |
| author2 | Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) |
| author_facet | Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Moodera, Jagadeesh Muller, Martina Miao, Guoxing |
| author_sort | Moodera, Jagadeesh |
| collection | MIT |
| description | Spin filtering happens due to the discriminative tunneling probabilities for spin-up and spin-down electrons through a magnetic barrier and can result in highly spin polarized tunnel currents. Combining two such barriers in a tunnel junction thus leads to large magnetoresistance without the necessity of magnetic electrodes. We demonstrate the realization of such unconventional tunnel junctions using double EuS spin filter barriers with Al electrodes. The novel nonmonotonic and asymmetric bias behavior in magnetoresistance can be qualitatively modeled in the framework of WKB approximations. |
| first_indexed | 2024-09-23T09:54:03Z |
| format | Article |
| id | mit-1721.1/51375 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T09:54:03Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/513752022-09-30T17:33:10Z Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence Moodera, Jagadeesh Muller, Martina Miao, Guoxing Francis Bitter Magnet Laboratory (Massachusetts Institute of Technology) Miao, Guoxing Muller, Martina Moodera, Jagadeesh Miao, Guoxing Spin filtering happens due to the discriminative tunneling probabilities for spin-up and spin-down electrons through a magnetic barrier and can result in highly spin polarized tunnel currents. Combining two such barriers in a tunnel junction thus leads to large magnetoresistance without the necessity of magnetic electrodes. We demonstrate the realization of such unconventional tunnel junctions using double EuS spin filter barriers with Al electrodes. The novel nonmonotonic and asymmetric bias behavior in magnetoresistance can be qualitatively modeled in the framework of WKB approximations. National Science Foundation Office of Naval Research 2010-02-05T16:10:26Z 2010-02-05T16:10:26Z 2009-02 2008-10 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/51375 Miao, Guo-Xing , Martina Müller, and Jagadeesh S. Moodera. “Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence.” Physical Review Letters 102.7 (2009): 076601. (C) 2010 The American Physical Society. https://orcid.org/0000-0002-2480-1211 en_US http://dx.doi.org/10.1103/PhysRevLett.102.076601 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Moodera, Jagadeesh Muller, Martina Miao, Guoxing Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence |
| title | Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence |
| title_full | Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence |
| title_fullStr | Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence |
| title_full_unstemmed | Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence |
| title_short | Magnetoresistance in Double Spin Filter Tunnel Junctions with Nonmagnetic Electrodes and its Unconventional Bias Dependence |
| title_sort | magnetoresistance in double spin filter tunnel junctions with nonmagnetic electrodes and its unconventional bias dependence |
| url | http://hdl.handle.net/1721.1/51375 https://orcid.org/0000-0002-2480-1211 |
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