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One-Step Atmospheric Pressure Synthesis of the Ground State of Fe Based LaFeAsO1−δ

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Abstract

We report an easy and versatile one-step synthesis route for a newly discovered Fe based LaFeAsO1−δ compound with 0.0≤δ≤0.15. Instead of widely used high-pressure-high-temperature (HPHT) synthesis, we applied the normal atmosphere solid-state reaction route. The stoichiometric mixtures of Fe, La2O3, La, and As in ratio LaFeAsO1−δ with 0.0≤δ≤0.15 are sealed in an evacuated quartz tube and further heated at 500, 850, and 1,100 °C in Ar for 12, 12, and 33 hours, respectively, in a single step. The resulting compounds are single phase LaFeAsO crystallized in tetragonal P4/nmm structure. These samples showed the ground state spin density wave (SDW) like metallic behavior below around 150 K. In conclusion, the ground state (non-superconducting) of newly discovered Fe based superconductor is synthesized via an easy one-step solid-state reaction route.

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Authors and Affiliations

  1. National Physical Laboratory, Dr K.S. Krishnan Road, New Delhi, 110012, India

    V. P. S. Awana, Arpita Vajpayee, Monika Mudgel, Anuj Kumar, R. S. Meena, Rahul Tripathi, Shiva Kumar, R. K. Kotnala & Hari Kishan

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  1. V. P. S. Awana
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  2. Arpita Vajpayee
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  3. Monika Mudgel
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  4. Anuj Kumar
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  5. R. S. Meena
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  6. Rahul Tripathi
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  7. Shiva Kumar
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  8. R. K. Kotnala
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  9. Hari Kishan
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Correspondence to V. P. S. Awana.

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Awana, V.P.S., Vajpayee, A., Mudgel, M. et al. One-Step Atmospheric Pressure Synthesis of the Ground State of Fe Based LaFeAsO1−δ . J Supercond Nov Magn 21, 167–169 (2008). https://doi.org/10.1007/s10948-008-0320-5

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  • DOI: https://doi.org/10.1007/s10948-008-0320-5

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