Tkachov, Grigory and Richter, Klaus (2008) Spin-polarized tunneling through randomly transparent magnetic junctions: Reentrant magnetoresistance approaching the Julliere limit. PHYSICAL REVIEW B, 77 (18): 184427. ISSN 2469-9950, 2469-9969
Full text not available from this repository.Abstract
Electron conductance in planar magnetic tunnel junctions with long-range barrier disorder is studied within Glauber-eikonal approximation enabling exact disorder ensemble averaging by means of the Holtsmark-Markov method. This allows us to address a hitherto unexplored regime of the tunneling magnetoresistance effect characterized by the crossover from k(parallel to) conserving to random tunneling (k(parallel to) is the in-plane wave vector) as a function of the defect concentration. We demonstrate that such a crossover results in a reentrant magnetoresistance: It goes through a pronounced minimum before reaching disorder- and geometry-independent Julliere's value at high defect concentrations.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ROOM-TEMPERATURE; PARTICLE POINT; CONDUCTION; SCATTERING; TRANSPORT; ELECTRONS; BARRIERS; VIEW; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Nov 2020 06:19 |
| Last Modified: | 04 Nov 2020 06:19 |
| URI: | https://pred.uni-regensburg.de/id/eprint/30987 |
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