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Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes

Lu Jianduo and Xu Bin

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Abstract: In this paper, by using the transfer matrix method, we theoretically investigate the magnetoresistance (MR) effect in a two-dimensional electron gas (2DEG) modulated by two Schottky metal (SM) stripes and two ferromagnetic (FM) stripes on the top and bottom of the 2DEG. From the numerical results, we find that a considerable MR effect can be achieved in this device due to the significant difference between electron transmissions through the parallel and antiparallel magnetization configurations. We also find that the MR ratio obviously depends on the magnetic strength and the electric-barrier height as well as the distance between the FM and SM stripes. These characters are very helpful for making the new type of MR devices according to their practical applications.

Key words: magnetic nanostructuremagnetoresistance effectmagnetoresistance ratio

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    Received: 03 December 2014 Revised: 13 February 2012 Online: Published: 01 July 2012

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      Lu Jianduo, Xu Bin. Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes[J]. Journal of Semiconductors, 2012, 33(7): 074007. doi: 10.1088/1674-4926/33/7/074007 Lu Jianduo, Xu B. Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes[J]. J. Semicond., 2012, 33(7): 074007. doi: 10.1088/1674-4926/33/7/074007.Export: BibTex EndNote
      Citation:
      Lu Jianduo, Xu Bin. Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes[J]. Journal of Semiconductors, 2012, 33(7): 074007. doi: 10.1088/1674-4926/33/7/074007

      Lu Jianduo, Xu B. Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes[J]. J. Semicond., 2012, 33(7): 074007. doi: 10.1088/1674-4926/33/7/074007.
      Export: BibTex EndNote

      Giant magnetoresistance in a two-dimensional electron gas modulated by ferromagnetic and Schottky metal stripes

      doi: 10.1088/1674-4926/33/7/074007
      • Received Date: 2014-12-03
      • Accepted Date: 2011-12-15
      • Revised Date: 2012-02-13
      • Published Date: 2012-06-27

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