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Magneto-thermopower of parent compound LaFeAsO

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Abstract

We report the effect of magnetic field on the transport properties of polycrystalline parent compound LaFeAsO. The magnetic field has no significant influence on the structural phase transitions or spin density wave (SDW) ordering of small moments on iron, but causes large positive magento-resistance below 100 K. Meanwhile, the absolute magnitude of thermopower, which is negative, increases remarkably with increasing magnetic field below 100 K. Such a large positive magneto-thermopower was first reported in this iron arsenide. The result suggests that there could exist an enhancement of SDW gapping in holelike Fermi surface.

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Authors and Affiliations

  1. Department of Physics, Zhejiang University, Hangzhou, 310027, China

    Zeng-wei Zhu  (朱增伟), Qian Tao  (陶前), Yu-ke Li  (李玉科), Mi He  (何咪), Guang-han Cao  (曹光旱) & Zhu-an Xu  (许祝安)

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  1. Zeng-wei Zhu  (朱增伟)
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  2. Qian Tao  (陶前)
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  3. Yu-ke Li  (李玉科)
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  4. Mi He  (何咪)
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  5. Guang-han Cao  (曹光旱)
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  6. Zhu-an Xu  (许祝安)
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Corresponding author

Correspondence to Zhu-an Xu  (许祝安).

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Zhu, Zw., Tao, Q., Li, Yk. et al. Magneto-thermopower of parent compound LaFeAsO. Front. Phys. China 4, 455–458 (2009). https://doi.org/10.1007/s11467-009-0015-9

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  • DOI: https://doi.org/10.1007/s11467-009-0015-9

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