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Giant magnetoresistance in organic spin-valves

Author

Listed:
  • Z. H. Xiong

    (University of Utah)

  • Di Wu

    (University of Utah)

  • Z. Valy Vardeny

    (University of Utah)

  • Jing Shi

    (University of Utah)

Abstract

A spin valve is a layered structure of magnetic and non-magnetic (spacer) materials whose electrical resistance depends on the spin state of electrons passing through the device and so can be controlled by an external magnetic field. The discoveries of giant magnetoresistance1 and tunnelling magnetoresistance2 in metallic spin valves have revolutionized applications such as magnetic recording and memory, and launched the new field of spin electronics3—‘spintronics’. Intense research efforts are now devoted to extending these spin-dependent effects to semiconductor materials. But while there have been noteworthy advances in spin injection and detection using inorganic semiconductors4,5,6, spin-valve devices with semiconducting spacers have not yet been demonstrated. π-conjugated organic semiconductors may offer a promising alternative approach to semiconductor spintronics, by virtue of their relatively strong electron–phonon coupling7 and large spin coherence8. Here we report the injection, transport and detection of spin-polarized carriers using an organic semiconductor as the spacer layer in a spin-valve structure, yielding low-temperature giant magnetoresistance effects as large as 40 per cent.

Suggested Citation

  • Z. H. Xiong & Di Wu & Z. Valy Vardeny & Jing Shi, 2004. "Giant magnetoresistance in organic spin-valves," Nature, Nature, vol. 427(6977), pages 821-824, February.
    • Handle: RePEc:nat:nature:v:427:y:2004:i:6977:d:10.1038_nature02325
    DOI: 10.1038/nature02325
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    Cited by:

    1. Guangyi Chen & Shaomian Qi & Jianqiao Liu & Di Chen & Jiongjie Wang & Shili Yan & Yu Zhang & Shimin Cao & Ming Lu & Shibing Tian & Kangyao Chen & Peng Yu & Zheng Liu & X. C. Xie & Jiang Xiao & Ryuichi, 2021. "Electrically switchable van der Waals magnon valves," Nature Communications, Nature, vol. 12(1), pages 1-5, December.
    2. Lidan Guo & Xianrong Gu & Shunhua Hu & Wenchao Sun & Rui Zhang & Yang Qin & Ke Meng & Xiangqian Lu & Yayun Liu & Jiaxing Wang & Peijie Ma & Cheng Zhang & Ankang Guo & Tingting Yang & Xueli Yang & Guor, 2024. "Strain-restricted transfer of ferromagnetic electrodes for constructing reproducibly superior-quality spintronic devices," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    3. Wang, Liqiu & Zhang, Yuxiang & Cheng, Lin, 2009. "Magic microfluidic T-junctions: Valving and bubbling," Chaos, Solitons & Fractals, Elsevier, vol. 39(4), pages 1530-1537.

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