Zenger, Marcus, Moser, Jürgen, Wegscheider, Werner, Weiss, Dieter and Dietl, T.
(2004)
High-field magnetoresistance of Fe/GaAs/Fe tunnel junctions.
Journal of Applied Physics 96 (14), pp. 2400-2402.
Date of publication of this fulltext: 11 Jan 2010 13:21at publisher (via DOI)
Abstract
We investigate transport through 6–10 nm thin epitaxial GaAs(001) barriers sandwiched between polycrystalline iron films. Apart from a pronounced tunneling magnetoresistance effect at low magnetic fields, we observe a distinct negative magnetoresistance (MR) at low and a positive MR at higher temperatures. We show that the negative MR contribution is only observed for the ferromagnetic iron ...
Abstract
We investigate transport through 6–10 nm thin epitaxial GaAs(001) barriers sandwiched between polycrystalline iron films. Apart from a pronounced tunneling magnetoresistance effect at low magnetic fields, we observe a distinct negative magnetoresistance (MR) at low and a positive MR at higher temperatures. We show that the negative MR contribution is only observed for the ferromagnetic iron contacts but is absent if iron is replaced by copper or gold electrodes. Possible explanations of the negative MR involve suppression of spin-flip scattering or Zeeman splitting of the tunneling barrier, but neither of these explanations is fully consistent with the data.
Export bibliographical data
| Item type: | Article |
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| Date: | 15 August 2004 |
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| Institutions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
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| Identification Number: | | Value | Type |
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| 10.1063/1.1774255 | DOI |
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| Related URLs: | |
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| Classification: | | Notation | Type |
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| 75.50.Pp; 73.61.Ey; 71.70.Ej; 75.47.-m; 73.50.Fq; 73.40.Sx; 72.20.My | PACS |
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| Keywords: | iron, gallium arsenide, III-V semiconductors, ferromagnetic materials, magnetic semiconductors, magnetic epitaxial layers, semiconductor epitaxial layers, tunnelling magnetoresistance, Zeeman effect, metal-semiconductor-metal structures |
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| Dewey Decimal Classification: | 500 Science > 530 Physics |
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| Status: | Published |
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| Refereed: | Unknown |
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| Created at the University of Regensburg: | Unknown |
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| Item ID: | 11825 |
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